Brad Pitt in fight club is like the canonical example of non-bodybuilders talking about a good physique, but there are a lot of reasons it's not realistic.

He has a good face, and is famous, so that makes him look a lot better at a given size. The lighting is done to accentuate how big he is + he has some sort of film over his skin to make himself shinier. And he's also very lean which is not pleasant to maintain for long periods of time for most men. It's comparable to what a smaller person would look like if they were competing at a bodybuilding competition.