People's self worth is often tied to how the look physically.
People do things all the time to make them feel better about themselves. Why is having one type of surgery out of bounds but other types aren't?
If a woman gets breast implants to affirm her feelings, is that wrong? If a man who feels he shouldn't look bald gets a hair transplant, is that wrong?
There are not only two options for surgery to change your sex just as there are not only two options for surgery to look less bald. Your medical knowledge seems to be limited.
Where is your evidence of suicide being higher after gender affirming surgery than before? Do you know anyone that has actually had the surgery?
According to the literature, gender affirming surgery actually results in a lower suicide rate.
https://pubmed.ncbi.nlm.nih.gov/36950718/