YANBU to vote for whichever party suits you. That's what democracy is all about. But YABU to equate women's rights with 'knowing what a woman is' and excluding transwomen. The majority of women's rights violations involve people (usually men; even occasionally women) knowing all too well what a woman is; seeking to put and keep us in our place; and exclude us from supposedly 'male' activities, like voting, getting equal pay, education, etc.
Do you think the Taliban are seeking to blur gender differences???
The Republicans in America are seeking (and in some states already achieving) a clampdown on women's reproductive rights. I would worry more about a woman dying or at best being left permanently infertile, through sepsis caused by delays in aborting a dead or dying fetus, or about a 12-year-old forced to bear her own father's baby, than about possible unfairness in elite sport. Not that the latter is unimportant, but it isn't the be-all and end-all of women's rights.
And some Tories, including former PM Liz Truss, have endorsed Trump.
Even harsh economic policies tend to harm women more than men. For just one example, look at the recent harshly punitive treatment of unpaid family carers. And guess what sex most unpaid family carers belong to!