Exactly. And my entire argument is that "humans are humans, except for one "physics-shattering exception" is a really strong genre assumption to make, unless it's very explicitly called out by the source text.
I mean, we have in-game examples of where hard work and training will let you shoot fire from your brain (wizard and monk). Why is fighter the only one limited to Earthly reality in terms of what hard work and training will allow him to accomplish?
Does dumping animal excrement and dead bodies in the well cause any inconvenience for humans or is the water probably still fine with no treatment?
Does blindfolding someone stop them from seeing?
Is the human brain located in the hand and the heart located in the foot?
Do humans need to breath (unless they've been held under water)?
Does twisting someones neck really hard hurt them or can they just spin it back?
Do humans poop?
Does too much alcohol make humans get drunk?
Can most humans hear the really high-pitched dog whistles?
Can most humans see the visible light spectrum but not infra red or ultra violet?
Can you generally tell apart a human in their teens and in their 90s just by looking?
Do humans bleed when stabbed?
Do humans bruise when hit hard?
If you someone is tied down to a chair and their arm is cut off will they bleed to death?
Can a decapitated person probably just carry their head around? (Like the one character in the Halloween Dark Angel episode).
Do human children generally grow taller from year to year as they age?
Do humans lay eggs?
If doesn't think "humans are humans" do they need to stop and think about those and similar questions during play if they come up?