It is gender dysphoria, a mental disorder. The transgender suicide rate is over 50%, a rate much that has not been seen since Jews in concentration camps. Often times people claim we should be "tolerant" and let people be what they want, but you can not ignore biological and scientific reality. Why continue to normalize a mental disorder that will lead most to death?
You are 100% correct. These people need medical treatment on the first place. Normalizing a mental disorder may be harmful to the future generations. Also, this may cause more harm to the transgenders by creating an impression that they don't need treatment for this disorder.