So there are absolutely no parallels between gay people and transgender people but there are parallels between transgender people and a woman who deliberately blinded herself with drain cleaner?
This is obvious, but I'll spell it out again. There is no parallel between gay people and transgender people because gay people are simply people who are same-sex attracted and do not require body modifications. Transgender people think there is something wrong with their body which needs modification, similar to people who want to be blind/ have a limb amputated/ be paralysed. What is the difference in your mind between a man who wants his penis removed because he thinks he shouldn't have a penis and a man who wants a limb removed because he thinks he shouldn't have that limb?
Difference 1: Being transgender is not a disability. Post op trans people can still live normal, healthy lives and any hormones or surgery will not leave them severely compromised.
Children who are treated with hormone blockers during puberty followed by cross sex hormones will be sterile and will have no normal sexual function. Most people would consider their condition as 'severely compromised'.
Difference 2: Being transgender is a rare but recognised condition that around 1% of the population have. The women who wanted to be blind is surely a unique case.
What is 'being transgender? Is it suffering from gender dysphoria or the entire Stonewall trans umbrella? You say it is a 'condition'. What sort of condition? An illness? Or what?
Difference 3: It is not hard for most people to understand the appeal of wanting to be female. It is hard to understand the appeal of wanting to be blind.
Since women are generally treated worse than men in society, what is the appeal of 'wanting to be female'? Since people can't change sex, what does this say about the male people who want to be female and won't accept that it's not possible to change sex?