"why don't they just do X" can be a great question. Why not just use Riemann integrals for everything? Why not use timestamps as ids? Not knowing the answer

"why don't they just do X" can be a great question. Why not just use Riemann integrals for everything? Why not use timestamps as ids? Not knowing the answer is a good enough reason for asking, and I don't feel like I need to police people's feelings and decide if they were feeling curious or condescending when they asked. They'll learn either way, when the question is answered. I can imagine some people might have asked questions in a disingenuous or insinuating way ("why trust vaccines if the supposed experts can't get a ship unstuck") but I did not personally see any of that.