The argument i make is that if someone has paranoia and thinks that aliens are reading their mind, we try to help them through it and get them to let go of that fear.

If someone has depression and thinks that life isn't worth living, you need to change their perspective and realize that things will be different. If you encourage the negative thought processes and behavior in the previous 2 examples then bad things happen. It is objectively bad to encourage these thoughts and behaviors, I think that both left and right can confirm this.

Seeing our society ignore or even encourage some people and their negative thoughts to make radical, damaging changes to their bodies through medication or surgery is terrifying.

Gender dysphoria causes negative thought processes that lead to negative actions against one's self. It is 100% a mental illness.