I (physicist 27) am currently working in science communication with a ton of biologists, which means it's finally time to ask all of the biology questions I have always had. And I have to say, I'm amazed at the frequency with which they say "I don't know". Like, I had to ask a few of them "why are fevers/heatstrokes actually dangerous, what's the deal with heat there?" until I got half an answer ("maybe because proteins start denaturalizing at 40C?", which I dont entirely understand, because I dont really know what proteins are/do to keep you alive but I didnt want to press the issue)
Meanwhile, as a physicist, I find I'm surprisingly good at answering physics stuff (the only stuff I've had trouble so far is "does a lightning falling on you while you're in a car with no roof kill you?" (No idea what is needed exactly to kill someone with lightning) and "why does quantum tunneling happen?" which I felt I could not answer without a fuckton of math), and even if I dont actually know something I feel like I'm able to guess in the right direction (we then check).
Now I don't know many other physicists at the moment, so I don't have a decent sample, so now I'm struggling between "I, personally, am exceptionally good at bullshitting" and "maybe physics is in fact remarkably simple"