Calling it “established science” seems like an attempt to shut down scientific discourse and normalize gender dysphoria even though it is a complex topic that causes distress to many people and has ongoing ethical concerns. It becomes even more complex when considering the decades of funding of gender studies which has attempted to normalize and promote it rather than research solutions. Further complicating the issue are financial incentives that encourage treatments. And, there are social and legal incentives that encourage expanding the number of people with that diagnosis. For example, there currently seems to be a push to immediately affirm adolescents with histories of mental health conditions when a more cautious approach may be more helpful.
Edit: Anecdotally, I have a transgender nephew, and three of my good friends have transgender children. Both of my best friend's two children are transgender. My friend went through a bitter divorce a few years ago and was estranged from his 17 year old son for over a year. When he next saw him, his son had already started irreversable treatment even though he hadn’t had any symptoms a year prior. To me, someone who experimented with what they call 'gender fluidity' as a teenager in the 90s, this all seems unusual and should be handled more cautiously.
Edit: Anecdotally, I have a transgender nephew, and three of my good friends have transgender children. Both of my best friend's two children are transgender. My friend went through a bitter divorce a few years ago and was estranged from his 17 year old son for over a year. When he next saw him, his son had already started irreversable treatment even though he hadn’t had any symptoms a year prior. To me, someone who experimented with what they call 'gender fluidity' as a teenager in the 90s, this all seems unusual and should be handled more cautiously.