I work with professors at a university, the amount of times I've heard them complain about low attendance rates makes me think otherwise. Yes, professors don't

I work with professors at a university, the amount of times I've heard them complain about low attendance rates makes me think otherwise. Yes, professors don't usually TAKE attendance but they do make a big fuss when they notice half the class missing even if it's because the other half of class watches the lectures on their own time.