That's sometimes the case. One of my friends who owned a share in a construction/hvac business (he had the master plumber's license) cashed out and got a degree in counseling. He's now a full-time counselor and enjoys helping people and donates a lot of time and resources doing service projects.

His brothers just enjoy what they do, so they still own the business.

Not everyone enjoys college. I'm one that would much rather learn on my own than through a classroom. I enjoy having learned the things I did in college and felt I needed the piece of paper (and am now working on a master's to change fields), but as far as I've seen, there's no such thing as a degree I would enjoy. Just work or books I would enjoy.