I have to disagree somewhat. A degree can teach you a lot of things about bureaucracy and technical writing skills that many content writers lack. It also teaches discipline and a hard work ethic.
Plus in my experience, it allowed me stand out when applying to freelance gigs without a portfolio. And I got a some decent office job outside university that taught me skills relevant to managing clients.
I don’t think there’s a right or wrong way but I think regretting it or shaming people for not starting sooner won’t be beneficial for anyone. While I wish somewhat I started writing online as a young adult, I don’t think I would be nearly as good a writer as I am now without my degree.
That said I think going right away is a mistake. I took a year off between high school and university which allowed me to choose a clear path so that is good advice for sure! :)