Speaking from experience,
It’s possible to get entry-level jobs in sales, marketing, graphic design, photography and copywriting without a college degree. Upper-level positions in these fields sometimes value years of experience over a degree.
I’ve known happy and very successful people who do not have college degrees, including computer network administrators, a classical musician/instrument maker, a horse rancher, and a restaurant owner.
I’ve known miserable, unemployed, deeply-in-debt people with their Masters or Doctorates.
On the other side: my friends who are in medicine, law, physics, and engineering would not have landed even their first jobs in these fields without at least an Associate’s degree and their current success required many years of formal education.
Also, a lot of people don’t discover the talents, abilities and interests that lead to their eventual success and/or happiness until they go to college and take courses in a variety of subjects.
There’s also the extra-curricular side of college, which for some people has a far greater impact on their life than the degree-earning: The friends you make in college, the experiences of living apart from family and in a different environment, going to parties and shows and dating… College can be a time of adjustment between being a kid in high school and balancing all the realities of typical adult life – such as having a full time job, owning a house, raising kids, trying to find time to take a vacation.
All that said, I learned more working in a print shop than I did in my years at Graphic Design school, and I didn’t form lasting friendships with any of the people I met in college. I picked up more social skills and more about how to be a successful adult through my various hobbies and workplaces than I did living on campus and taking courses. So I’d say, 18 years after graduation, if I could do it all over again I would skip going to college.