Again, essentializing.
The reality is that gender reassignment surgery is still being studied, and is in no way viewed as intrinsically harmful by the APA (although they acknowledge that the quality of surgeries being performed varies, and is important). All they do is advocate for a combination of mental health care in addition to surgery.
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. Treatment itself is still being evaluated. But there's no consensus that says "Oh this is bad, stahp"
Additionally, did you even think to consider that higher mortality rates might be due to the fact that trans people post-surgery are treated discriminatorily post-surgery? Gender dysphoria isn't "cured" by surgery, it also has to do with interactions with individuals and access to institutions or health afterwards. The article you cited doesn't condemn surgeries, but rather illuminated the need for post-surgery care in *** reassignment cases.
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Both of these articles directly reference the article you cited as evidence that doesn't invalidate gender reassignment, but rather, seeks to improve how we position transgendered people in our societies afterwards.
Take easy answers if it makes you feel better.