This is very true. My old neighbor owned a paint store and gave me a big discount on the paint I used for my Accord when it was being painted DWP and I still spent roughly $1,000 in materials for paint, pearl, clear, basemaker, hardner / reducer.. and so on.
The guy who painted my car was my friends dad and he worked for Macco. He told me they did the half ass jobs because of the money they paid them and what not. Now when he painted my Accord in his booth at his house, it looked like a factory job. Absolutely no over spray, all windows were taken out, doors were taken off the car, bumpers were off, fenders were off, part of motor was pulled, interior was gutted.. and I paid him a good amount since he went out of his way to make sure it looked like an OEM paint job.