> Try this at a bar in rural (red) Ohio
I don't think anyone should be asking bars in Ohio, or anywhere, about this. No more than I would ask a bar in Ohio what they think of climate change. Or a group of theologians in the 16th century about how they felt about astronomy. Or computer science majors about the ethics of vegetarianism. This is just a crass appeal to common sense, where common sense is defined by what mostly white low-education blue collar workers supposedly think.
> you'll finally understand that women have penises and men have vaginas
No, you misunderstood. (First of all, that's not even the correct claim, you should have said some of them do.) But even with that, you misunderstood. The point isn't that you have to accept that transgender people exist. It's that inserting concepts like "adult biological woman" does not show that transgender people do not exist. Nothing interesting whatever can be shown with this distinction. The "biological" part of it doesn't hang together in the way you want it to. More generally, the problem is that critiques of concepts around transgenderism tend not to be well thought out at all (that includes both sides); if you want a proper critique you need to be reading people who have been trained to think consistently about difficult topics around gender, sex, social behavior, etc.
But my interest here is more that we're now up to 634 comments on an article that makes no real argument whatsoever. The author is just here to complain that transgender people have stolen her vocabulary word. Is there really any plausible explanation for why so many people have gathered here other than that a bunch of anti-trans people smelled blood in the water?