Earlier quoted context omitted.
everyone knows that quote but I doubt you've read WofN - about 1 paragraph later he says that this will drive the worker insane and may literally lead to the collapse of society: "The man whose whole life is spent in performing a few simple operations, of which the effects are perhaps always the same, or very nearly the same, has no occasion to exert his understanding or to exercise his invention in finding out exped…
That sounds about the same as normal factory work if we're being honest, which is still around. Yes, it really does bore you to death. No, it doesn't make you incapable of thinking. Usually the people who take a crap job like that simply don't spend that much time on intellectual pursuits to begin with. What it does do is to drain you of all energy such that it's hard to get away from it to something more decent.
Well that's definitely not elitist...