No, I don't think that's true. Getting paid just bumps it up a notch, but if you care/are-anal, you're gonna try harder anyway.
Quick test: if you're explaining to your wife what you're working on and she doesn't ask, "Who ever's gonna notice THAT?", then you're not trying hard enough.
Quick test 2: look at the buildings on the FB maps. Buildings are a notorious PITA because they require so much more detail than anything else. Notice how much extra detail is on those buildings - all the dormers, TOR (Things On Roofs), damaged areas, little cutouts and add-ons, etc. All of that stuff doubles or triples the amount of time it takes to do each individual building. Then multiply by how many buildings there are. It's ridiculous, and there's no way to automate it.