Interesting perspective. Fulfillment is an interesting thing to contemplate. It seems that goals don't make happiness: once you achieve your goals, that's it, there is no infinite pleasure after that.
Think about it: a lot of people think they'll be happy if only they had a lot of money. What they don't realize is that they do, actually, have a lot of money, as well as many other things they take for granted, if we compare them to, say, someone in a civil war zone in Somalia. And yet, these privileged people are not necessarily happy.
The idea of dirty but fulfilling jobs demonstrates that, more importantly than aiming to make money, is the challenge of "now".