I know a very nice young man who is an extremely intelligent biochemist.
He's never handled livestock in his life.
Last week, I taught him how to shear, vaccinate, and condition score sheep. Not that those can be learned (well, the vaccinating perhaps) in a day, but he did a wonderful job. I've taught close to a hundred people how to do many of the things we did that day, and none of them came close, despite the fact that many of them were farm kids.
He has no intention of shearing as a career, of course. But he has always wanted to try it.
I do believe that most jobs can be appropriate for Catholics- I don't really understand why for some people, only certain ones apply. Not saying that is what you mean, Matthew. It's just an observation.
Each person is an individual and each possesses different skills.
It's an honorable way to provide for one's family, farming. So is being an engineer or veterinarian or sheep shearer or molecular biologist. I'd love to see Catholics in every field.