Do you know people who do that kind of work? I spent three years working with a decent sampling of them. Sure, some feel that it's drudge work and that they're stuck doing it for lack of options. They get through their day doing the minimum necessary - you can find those types in our field as well. But a lot do take real pride in what they do, and in doing it well.
Of course many if not most would take an office job for more money if they opportunity were there - but that doesn't mean none of them derive pleasure and satisfaction form the work they're doing.