Ah - so if gender can be anything one wants it to be, then no-one is by your own measure understanding gender wrong as you claim.
Except - it isn’t true, is it, that a social construct can be anything you want it to be, because social constructs are limited by material, as well as social, realities.
Money is a social construct, but my imagination can’t magic more into my account.
Many scientific theories are social or intellectual constructs - there are very serious academic arguments for example that large parts of mathematics are constructs - but despite the fact that much of probability theory may be a conceptual construct, there aren’t more than two sides to a coin flip.
Art and literature is a an imaginative construct, but I don’t get to argue that the French impressionists influenced medieval iconography, or claim that I wrote Anna Karenina. I also can’t just think great poetry out of my head onto the page, which ought to be more than possible if social constructs can be anything you want them to be.
Law is a social construct, but if I murder someone I can’t imagine my way out of a murder trial; or claim that I don’t recognise the legality of the Crown Court because I’m an anarchist and get off scot free.
Nation-states are social constructions, but somehow I don’t get to imagine my way into being an American, or get to get on a plane to China without a passport and visa because the imaginative possibilities of nationhood are limitless.
We could go on with these basic examples of how something being a social construct doesn’t mean that it’s some kind of limitless made up imaginative potential.
If gender is anything you want it to be, then it ceases to have any particular meaning. So why would anyone be complaining if they’re misgendered or not? Because logically you could just say anything about gender and so could anyone else, and as such my view of gender is just as valid as anyone else’s, so I don’t have to care a jot what theirs is. And neither can they complain about mine.
I mean, sounds great; but it seems like the gender ideologues actually care quite a lot about defining what gender is and forcing everyone else to agree.