No, you should to learn the technical skills. But you have to get business skills somehow.
The real challenge is finding teachers who: care enough to teach the skills you need, have real experience themselves (no teachers who've followed the model "those who cannot do, teach"), won't force you to ape old styles, and who will both critique you to make you stronger and be friends with you, when you need them to be.
Good teachers are hard to find.
But, the real challenge isn't art school, it's everything that happens afterward.