It can be useful for careers in graphic design, animation, illustration. It's just fun for many, but serious preparation for others.
For some it would probably be pointless to take an art course. It depends on your goals and what you want to get out of your education.
When I was in college I needed a certain number of credit hours in "the humanities" to get a degree. When choosing electives I would consider things like..
1) Am I likely to get a good grade (I was very focused on grades)
2) My interests - I tend to enjoy certain subjects (e.g. astronomy)
3) How important is it that I learn the subject matter.
I hope this helps.
If you enjoy it as an elective, go for it. If you are looking for a career in art, good luck with that idea. Don't know of anyone who's made a go of it personally.
Learning is never pointless.
Not at all. For anybody. Ever.