Even as a "tucute" (i'm dysphoric, but not a transmed), this reads as a very biased page, which a wiki shouldn't be. Here, let me revise:
Transmedicialist or transmeds (also known as truscum) are a group of mostly trans people who believe one must experience dysphoria to be trans. They call non-dysphoric trans people and their supporters "tucutes".
Truscum Ideology
Transgender Identification Disagreements
Transmedicalism is the belief that trans people must have dysphoria to be trans. This idea originates from various sources of literature (I don't have any so someone else will have to find them) and study that supports the argument that gender incongruence (to not identify as the gender assigned at birth) is the same as gender dysphoria, or that incongruence must in some way cause dysphoria. How this dysphoria manifests itself, whether it is obvious or not, is up to argument as well.
Models of Gender Dysphoria and diagnoses of Gender Dysphoric Disorder (previously Gender Identity Disorder) state that one must have gender dysphoria in order to medically be recognized as having gender dysphoria, which many financial and medical/government-funded clinical groups require a diagnosis of before allowing a person who is transgender to medically transition under financial support.
"Transtrenders"
A common slang term used among those identified as transmeds, is "transtrenders," which refers to anyone without dysphoria or those who do not want to medically. They believe that "transtrenders" only claim that they're trans because they it's a "trendy" thing to do and they want attention. The supporting argument was Rapid-Onset Transgender Disorder, a recently declared phenomenon that referred to a recent trend in teenagers identifying as transgender as being a symptom of social or sociopsychological dysfunction, causing the teen to believe they were trans when they are not. This has, however, been disproven by the transgender and medical communities to be extremely understudied, and largely transphobic in nature.
Beliefs and Arguments
Other common beliefs among transmeds is that if someone supposedly without dysphoria were to medically transition, then they will experience dysphoria. This is supported by accounts from several people who confessed they made said mistake. Another common chant, is that the reason access to hormones, treatment and even diagnoses is the result of transtrenders 'clogging the system' and taking away these resources from those who are truly transgender and dysphoric.
Counterarguments
However, despite these beliefs, some counterarguments can be made. Proof of large numbers of nondysphoric transgender people detransitioning due to onset of dysphoria has yet to be found; instead, among some research (once again I have to find the sources for this one) the highest cause of detransition in America is lack of funds. There are some accounts from those who claim to be nondysphoric when transitioning, who did not develop dysphoria.
Gender euphoria (described as 'an increased sense of validation, belonging or certainty caused by a change in one's gender expression or identity' for the sake of this article) is prevalent among those who say they are nondysphoric, saying that they do not feel any symptoms of dysphoria, but rather euphoria, when expressing their gender.
In the Diagnostic Statistics Manual V. 5 (DSM-V), the requirements for diagnosis for Gender Dysphoric Disorder leave open the possibility for someone to not have expressed symptoms of physical, genital, or social dysphoria, but rather a strong desire to be another gender, and to have already had this interest for longer than 6 months. This contradicts the current APA manual of Gender Dysphoric Disorder diagnosis, which requires that one must have some symptom of physical, genital, or social dysphoria, in order to be diagnosed. It should be noted that while the APA is primarily used in Europe and non-US countries, the DSM-V is largely in use by the US and Canada.
While the argument arises that there are severe restrictions to medical transitioning in most countries, particularly the UK and those in the EU (not not exclusively), many explain that the reason for the exhaustive wait times and lack of accessibility to medical treatment may actually be a lack of government support, or lack of social understanding. Indeed, there has been severe pushback in the United Kingdom over support for the transgender community. Only a small number of clinics that are qualified to support transgender individuals seeking medical transition exist across England, versus the thousands that exist in the US. As well, the US has an "informed consent" option, in case one wants to transition, but does not meet the criteria or do not want to wait on clinical diagnosis to begin medical transitioning. The counterargument to this, however, is that in the US, more states are regulating bathroom use and sports involvement between transgender individuals, restricting them to only use bathrooms and perform sports for the sex they were assigned at birth. These laws are mostly within the Southern US, but do exist in other states as well. Further, the US's current financial health industry is run by corporations and financial institutions, with coverage being based on the employer's choice, and with a required amount of money to be spent on medical treatment before qualifying for medical coverage, an arguably unhelpful and even life-threatening method of financial-medical coverage that is not seen in other countries of similar government models and medical advancement.
Dysphoria and Models of Dysphoria
(Insert known diagnostic manuals for symptoms of dysphoria, I don't have time to find them all) (this is so one can compare the APA, DSM-V, and ISN to each other, based on diagnostic criteria, time of updating, and amount of support. Include the WHO diagnostic criteria as well.)