Also, annoyingly, most people are absolutely shit at identifying bias, on both sides of the argument.

Personal example: when I went to the doctor with a painful lower back, and a weirdly pulling muscle above my ass, he said it was very likely due to my weight.

Well, that was obviously fucking bullshit weight bias, and he wasn't taking me seriously because I'm a woman. Besides, I have PCOS, so I can't help it.

Except when I lost the weight, the pain went away. And so did the sore knees, and the shortness of breath I didn't even notice I had. And the PCOS complaints got much better. So... Yeah, it wasn't a biased doctor, the guy was entirely correct, I just didn't like the answer.

And at other times, medical science is just straight up wrong, and we found out after it improved. I had some amazing semi-permanent birth control implants, that unfortunately turned out to occasionally rip your insides to shreds. Whoops. So I got them removed, which sucked ass. Was that bias? Or just medical science advancing?