I'm 31, got my degree in literature with a minor in music performance. I'm not highly paid (just started bringing home about $30,000, plus whatever I put into retirement--I just checked the box next to "max allowed", so I don't know the percentage) but I work in a mustachian field (I work in a library) that I respect and enjoy. Also, I wrote a book which is being mulled over by an editor, so I'm really putting my degree to use.
I also do musical ventures on the side (not much money, but it's so damn fun!) so I'm even using my minor.
Would I recommend my path? Well, to some yes and others no. I would say that it all depends on ability, interest and, yes, drive. Writing a book is useless if you don't have the courage and the wherewithal to send it out to publishers, or to self-publish. Music performance is not for people who hate putting on a show. Working in a library wouldn't do for those who require a fast-paced job, who can't handle politics (you betcha) or working with people (oh gawd, the people sometimes!), or those who are ONLY looking for a well-paying job.
I'd say that, as a group, mustachians tend to be smart enough to make the most of what they've got, whether or not the world tells them they're making good choices and despite/because of the hand they've been dealt. My eyes glaze over when mechanical stuff comes up, I've just never had an interest in it. But I love books, and I've been employed since I graduated. Why is it considered ok on this site to dump on people just because they didn't get an engineering degree, or become a plumber if they had no interest in said engineering degree? As someone upthread said, it takes all types to make society work, and I'm frankly proud of my degree whether or not other people deem it "useless". I don't think it is, nor would I even if I was unemployed. I got a lot of value out of the learning.