LOL!
The people of Louisiana, Texas, and Latin America and other countries where kidney beans are regularly eaten would laugh at this, would just say "you suck at basic cooking".
I’m Mexican-American. I grew up eating beans cooked at home. Many people didn’t, and maybe education is better than mocking. But then again, this is the shaming board.
My family also never cooked kidney beans from scratch (I still don’t). I had no idea how much more toxic they were, compared to my usual pinto and black beans, until we discussed the lectins in a college bio class. Even recipes for red beans and rice (not a local dish here; I have no friends or relatives from Louisiana) don’t usually list a disclaimer.
I grew up in a fairly 'foodie' family, considering white, middle American, Midwestern culinary culture of the 1970s/1980s, but they never cooked beans. Beans were for poor people who couldn't afford meat. I never ate beans, nor Mexican food, regularly until I was in college in the Southwest. And the beans were mostly cooked for me. I learned to make my first bean stews (black bean or lentil) in a big pot (which boiled), but no recipe I ever saw warned that some beans were toxic if under-coooked. I worried about meat being undercooked, but never grains or beans. Hell, grains were to be eaten raw in granola and cereals. Why would beans be dangerous? And I never ate kidney beans, and still don't, b/c I don't like them. So by the time I had a crockpot it was decades later and it never even occurred to me and I happily slow cooked my beans at barely a simmer.
It isn't that surprising that lots of people wouldn't know this. Lots of things about cooking seem intuitive after you know them, but not before.
Hell, my husband was well into his 30s and was working on his doctorate, and still didn't realize how dangerous it was to put the cooked chicken back on THE SAME PLATE that he'd placed it on when it was raw. No one ever told him that, and he never consulted cookbooks, just cooked by trial and error. So he got incredibly lucky and just never learned that until I told him.