First off, pretty significant difference between dying and changing your body to match your mental state. In only one of those cases are you dead, which is why we try to prevent people from committing suicide.
Second, it's rare that suicidal ideations are solved by therapy alone. Usually, some form of medication (typically an antidepressant - or several) is required. No such medication exists for body dysphoria, and even if it did, I don't know that all trans people would take it. As I asked earlier in the thread, how do you decide which takes precedent - your physical features or your mental features? Both are controlled by your genes - how do you know which one is actually incorrect in a case of body dysphoria? Furthermore, medications can have severe side effects, and some may not be willing to risk those side effects.
You can't force someone to take medication or go to therapy, and you haven't provided any real arguments for why gender affirmation surgery should be banned, so I'm not sure what you're getting at with this.
