Agreed, and if the position being advocated by many on the left was merely that people should be free to express themselves however they please, I don't think the right would have found it an effective line of attack. Most people on the libertarian branch of the right would likely agree in principle too.
I think that it was very strange how this became such an issue. Like, as long as it doesn't hurt anyone, who cares about another's gender expression?
But it's such a tiny proportion of the population, and matters much less than making things better for the populace (which is the whole point of governance).
I'm not a Marxist, but the whole culture war stuff is very very convenient for those who don't want to work on reducing inequality (by taxing the upper earners more). And given how much of the Democratic vote is dependent on these people, I guess it makes political sense in the short term.