This is something that is a problem, but I think the reason that it is particularly difficult is that it's potentially so for a lot of things we might legislate about. There are some things everyone really agrees about, and they aren't usually problems - the metaphysical implications don't come up because they are just assumed by all.
There really are different implications for what you might call the spiritual anthropology in genderism, so any time someone wants to take an action or have a customary approach to something concrete that is related, it will become obvious that there are real differences in belief. I think though this is true of quite a few controversial social changes or legal changes - they are controversial because they reflect different ways of conceptualising the issue.
For me, the question becomes, if there is a need to make some kind of decision that will materially affect people, how do we do it under those conditions? Some people will say that any non-religious worldview should trump a religious one - I think that's a fairly significant betrayal of secularism myself, which is meant to avoid institutional preference one type of worldview in governance, be it Christian or Marxist or logical positivism or anything else.
It's difficult though to avoid reflecting whatever worldview most people have, because those are the sorts of things they will value and want to enact in the way society is run. All our laws and regulations and customs ultimately reflect a certain worldview, they aren't really neutral.
My sense with this issue is that it won't be really fruitful to complain about the bare fact that genderist ideas reflect certain worldviews - if most people believe them, likely the law will end up reflecting that. It's important to talk about freedom to exchange ideas, and disagree, but my sense is there is a distinction there.
What I find interesting is I think actually quite a lot of people don't agree with some of the ideas being put into law, and maybe aren't aware. OTOH, how many would be happy to see laws ahead of personal views in the population on other issues they think are important? In any case, I suspect the only way to prevent this kind of change is to convince people they don't want it, so that worldview doesn't become dominant.