Why would they? We're all adults and all more or less understand the rules of the game. And in rare cases in my career when the company culture was all about working long hours and living at work, I just tend not to stick in such places for long
Case B is different. Case B is where you work somewhere with reasonable work-life balance, but where you have a colleague who persistently under-performs. They won't do the essential documentation, follow the process correctly and they will quite happily sit through meetings and not volunteer a solution they know the answer to unless explicitly asked in just the right way and they happen to feel like it that day. This can take a few different forms - my list is not exclusive but it boils down to "quiet quitting" - but, as you say we are all adults, and we know who these people are.