For starters there really are some professions, not just Wall Street, where you have to have a degree from an accredited institution in order to work. Medicine for example, or engineering, or law, are all going to require the proper degrees in order to get certified to work in the field. You may not find that work interesting but clearly a lot of people do and pursue those careers by getting the education required to get started. Higher ed isn't just a bunch of handwaving and bullshit designed to fool HR into interviewing you.
The crippling debt thing is such an overblown myth too, but maybe you'd realize that if you'd actually gone to college. Just like any other investment or major purchase there are smart ways of buying and education and stupid ways of doing it. Even with rising tuition you can get a good education at a state school and come out with a little or no debt if you keep a job and live within your means while a student. I finished my Bachelors with only $5K in student loan debt for example.
Students and their parents just have to keep in mind that higher ed is an investment, not some extended fantasy camp for spoiled kids which seems to be the universal failing of most families you hear interviewed about crushing debt burdens from higher ed. "Oh my precious Tiffany would've been heartbroken if I'd told her we couldn't afford for her to go to Vanderbilt for her degree in underwater basket weaving... so we took out 150K in loans a year and are now fucked because she's only earning 8.50 an hour as a part-time docent at a folk-art museum in bum fuck Oklahoma" That makes for a great news story some how but really isn't representative of most people's college experience.
There's generally two smart ways to approach your college investment, assuming you don't have rich parents. One is simply to go to your local state college, work part time and live frugally while studying. You'll come out of it with manageable debt and a leg up starting your career. Or if you're smart, driven and talented enough you can bet big, pay out the ass for a prestigious degree and home the gamble pays off with a rock-star job that'll make the $200K in student loans manageable. I know exactly one person who's pulled that off, she went straight from Stanford law to a job with a top ten law firm making around $180k/year to start. You don't take on that sorta of risk without a clear plan for a payoff.
Of course as has already been pointed out a lot of the examples listed in the summary were of tech billionaires that went to college, made the connections they needed to be a success and started their businesses before graduating. They dropped out because their college investment had already paid off without the degree.