And the majority of people NEVER learn, and never learned how to learn. Which is what schooling is supposed to do.
Learning skills is training, and you can train people all day, but true learning is how to apply one skill to problem solve another. You can teach someone 3 x 5 = 15 all day, but then show them 5 x 3, and watch them be stumped.
Whether or not you need college or not dependent on the person and the field. However, no matter your career path, you definitely will need some sort of institutional learning to go further in it.