Yes, you do.
2&3: I knew a guy, his father had sheep, plenty of them. He never bothered with Uni. He has been studying/training on seminars regarding agriculture, animal care, etc. He is set for life. He will never sit on a university theatre and keep notes. He does use technology (I remember how he was shocked when he discovered YouTube videos that exploded his mind and knowledge).
He picks up the phone and speaks to vets, he talks to agriculture specialists, he watches seminars, he gets better. He stays on top/ahead of things. He never spent 1 (pick your own currency) on University, housing, (Uni) books.
He stays in touch with his peers both in his country and abroad (he was taught English early on and how he sees the value of that investment).
I see him though being a guest lecturer in a Uni, to speak as a professional on this/his industry, speak on his part of the supply chain, what he would expect of "Education" to provide for him (his industry) in the future, what he would like to see people do for the promotion and progress of his industry. But pay for classes? Never.
So.. 2 & 3 :)
Edit: typos
They guy I was referring to in my post above, started with a certain wealth (even if that wealth is in a form of a 200-sheep-herd), a certain skillset (assisting his father in the business while growing up, having a 'knowledge base' right there in his home, having connections, having the equipment). What has gotten him to a few thousand animals since, is hard work and "invest in knowledge as you go". He didn't start from scratch.
The benefit with his line of business, is that the wealth/skills-handover was happening since he was 10 (experience, skills, knowledge). If one is to become a doctor, the mental training may start early on, but the actual knowledge is coming much later, and at a greater cost ($)(especially in the USA).
That's easy in the first year or so. It's harder to get proof that you're as smart as your professors. If you are Robin Williams and a Juilliard professor tells you that he has nothing to teach him, by all means fuck off and do your thing. Otherwise, chances are that you should stay in school.