There are lots of areas where formal education is a must.
Even when you can self-teach everything, you still need some structure, some meta-learning, to learn what you need to study to build the pillars of your knowledge. And you still need some organization that certifies that you know what you claim you know. Medicine is an obvious example. Engineering is another. No-one would like to live in a tall building made by somebody who claims to know how to build tall buildings, but didn't go to college.
I bet not many pharmaceutical companies would like to hire someone without a degree to design a new drug. Regulations, insurance, credibility, lots of problems.
> Getting ahead in life by going to college is a dying notion.
So, yes... you can earn a lot of money without a degree, but if you want to work in some areas that need a degree, you must go to college.
And I see that with my sister today. She's 2 years older than me. She left university after 3 years, went to live to another country for 6 years, and came back with no money. She worked there, but spent a lot living large, having fun and enjoying her twenties. Meanwhile, I studied and worked (to pay my studies)..
Now, I earn almost 4 times what she earns. And it's difficult to her to find a job that she likes. She tried having her own business, and burned all of her savings. She started studying again, realizing that without a career, she's going to have a really hard professional future.
I know that the choices we both made are based on very different philosophies. She prioritized enjoying her youth, and that's OK. I prioritized investing in my future, and that's OK too.
But a formal education, is still a great tool to help you in your professional life, even when you can learn all by yourself.