I've run into a few devs on other forums (car forums) and they sort've had the 9-5 attitude. One was a producer and one an artist. Both were empolyed at AAA studios. I think it comes down to the fact that this is a passion/hobby for us. It is just a job for some people unfortunately.
Also interesting tidbit is that I once asked the artist-guy how he stumbled into the video game business. He said he dropped out of art school (not sure exactly what he studied), was working at an auto body shop painting cars for awhile and a friend offered him a job. I always have wondered how many people have stumbled into this business rather than sought it out.
I'm in the architecture field myself, level design/env art is just a casual hobby ( I wish I could spend more time, tbh). Not sure if I want to go the vid-game route yet, though.