For 8 hours everyday, imagine the metaphorical meaning that it's like taking care of a wailing, screaming infant. You have to spend all of that time, comforting and calming that child down. But you know, it's all going to happen again. You go home, do whatever, sleep and wake up until you have to do all of that shit over and over.
Because that's what jobs pretty much are.
Edit: …It's a metaphor, chill the hell out.