Lesbians are targeted because a lot of these men are straight, heterosexual men. The fact that they identify as women requires validation that they are women.
They're not interested in men because they're not gay. They're not interested in straight women, because straight women don't have sex with 'women', only men, and that ruins the validation.
So the only cohort left is lesbians. It gets them sex with a woman and, crucially, validates their womanhood, at the same time.
The equality act is not being invoked because transactivists have done a real number on public opinion. Elevating the protected characteristic of gender reassignment above that of sex, in people's heads.
Many people don't want to stick their head above the parapet, because they feel as though they are going against LGBT rights, a marginalised minority, it's not progressive, etc.
When what they are doing is not upholding the equality law, using the reasons that was designed in the first place. To protect all the characteristics.
And of course, you have plain old sexism. People listen to men, not women. They are shouting the loudest and being the most dominant.
Where are all the transmen demanding sex with gay men? Or demanding men be called cis? Bloody nowhere, because no one gives a shit what women say.
And, they probably don't say it anway because many are gay themselves. And women aren't in the habit of going around demanding sex from people who don't want it.
Socialisation, innit.