They know that by and large,the straight community would resist and the movement would break down. They're picking out the weak members of the herd. Lesbians have been in on the alphabet movement, so they're easy to go after as the mentality is "hey, you're in the LGBT community, don't tell me you're a filthy bigot", and since most in that community lean left, they fear being seen as a phobe b/c it would wreck their social standing; they may lose entire woke friend groups if a T decides to "expose" them as some sort of TERF who won't accept the ladyschlong. It is a gross tactic, but the problem is that there is no united front against it among lesbians b/c some are ok with it, some don't give a shit either way, but most of them want to be seen as progressive so they'll go along with it instead of actively resisting and fighting back b/c the personal consequences are too high.