It's a really nasty accusation to say that trans adults who support trans inclusive policies and healthcare for young people have some devious and conspiratorial sexual motive. It absolutely typifies the worst of this debate. Surely you can accept that the most likely reason trans adults support these policies and treatment is because we recognise it as something that might have helped us, and we don't want trans kids growing up with the same experiences we did of exclusion, bullying, self hatred and denial. It took decades for some people to get over that, so perhaps this is the reason we don't want to see it happen to anyone else instead of it being some elaborate plot ffs.
What is your definition of trans?
Is it gender dysphoria = trans or is it Stonewall umbrella = trans?
Because if it's the latter, and that seems to be the most pushed interpretation these days, then transvestites/cross dressers who are very open about the kink aspect are very much included.
It's not nasty to point out this is a problem. Many of the men who cross dress as a kink or fetish have embraced the opportunity to be trans with as much legitimacy as those with gender dysphoria. The evidence for this is all over the internet.
It's no good blaming women for being 'nasty' in pointing it out. It's a problem that stems from the lack of safeguards within the LGBT and the inability of the community to do any sort of gatekeeping.
In other words take it up with Stonewall who have promoted the idea that pretty much anyone falls under the trans umbrella and is valid - acceptance without exception.