Art school! Good God y'all, what is it good for?
Mentorships are the vital, organic process by which technique and philosophy are transmitted. Art schools are just an attempt to codify and make that process widely accessable. Art schools fail more often than they succeed, and I've known plenty of lousy academy-trained painters, and plenty of lousy Academy instructors.
The things that I did get out of school were generally through the mentorships that I found within that structure.
You could use a school to get your mentorship, and why not, but don't get sucked into believing that the school itself (along with its demands, cirriculum, etc.) is going to get you anywhere (unless you want to teach).