Of course I can't stop you from spreading these same falsehoods that we hear from the conversion therapy crew - that LGBT people are sick, and I can't stop you from holding these opinions, but I will continue to point out that you are not telling the truth, and that all the evidence says otherwise.
You need to drop your obvious extreme prejudice against mental illness or disorder and against the trans gender people who want it to remain in the DSM. There is no shame in having a mental disorder. It isn't an insult. It doesn't mean "conversion" is an option. It doesn't even rule out physical causes because that isn't the way that medical science works. The treatment for transgenderism remains accepting the individual's self-defined identity because that is the only successful treatment at this time.
The issue is much more complex than you allow for. Generally speaking gay people do not want to be changed. The binary type of transgender person that does wish to transition does see their condition as a disorder that requires medical treatment even if it is only hormonal. They do believe that something went wrong during pre-birth development that left them with an identity that does not match their physical presentation.
Many gay people consider the potential existence of a gay marker to be of mixed blessing because they don't want people to consider it something that needs to be corrected. Something to test for pre-birth so it can be changed. From that perspective finding a marker is a threat even though it would prove a physical cause. They see homosexually as something that occurs naturally and is normal if not the norm. No need for medical intervention.
Most binary transgendered people do want a marker found. They do want something that could be corrected pre birth. They do want their physical characteristics to match their gender identity. They do consider it a medical disorder.
Maybe some people are born with a gender identity and others are not. Maybe everyone is or nobody is. Right now it remains a matter of opinion not science.
If it is removed from the DSM that does not mean it will be classified as a physical disorder. It means it will be much easier to refuse medical treatment or to treat only the associated mental illnesses of depression or anxiety.
https://en.wikipedia.org/wiki/Gender_dysphoria
The diagnosis was reclassified to better align it with medical understanding of the condition and to remove the stigma associated with the term disorder.[5][6...The critical element of gender dysphoria is the presence of clinically significant distress associated with the condition."[1] Some transgender people and researchers support declassification of the condition because they say the diagnosis pathologizes gender variance and reinforces the binary model of gender.[5][8]
critical element of gender dysphoria is the presence of clinically significant distress
Like it or not, stigma or not, emotional distress not physical symptoms defines gender dysphoria. If you are transgender but not experiencing any emotional distress over it then you are fine. No need for intervention.