In California, I've met two people in the last two weeks who live comfortably on their income without a college degree. One of them was in medical sales consulting, the other worked at an art gallery managing the sale of works from the artists they represent to clients. The first started when they were in college and dropped out after their career began to take off, the second was promoted out of an internship.
I think sales in general may also be one of those fields where education is not that important.
That's a fair point: sales has always worked like that. I think there's sales and sales, though. Like, if you're going to be selling high-level stuff, to wealthy and/or sophisticated people, then your background (maybe not always, but generally including, education) really does matter. I don't know, though. I'm not part of that world.
I think sales in general may also be one of those fields where education is not that important.