Well for starters, you have courses on the freecodecamp channel which will literally teach you everything you need to know to get AWS DevOps qualifications. But you can teach yourself literally anything. MIT has seven thousand videos on its MIT OpenCourseWare channel. 3Blue1Brown and Khan Academy can teach you maths and science. If you want to be a repair man, or a mechanic - you can find a video of how to do it on YT. Design circuit boards, make movies, learn instruments - all on YT.

It's not that university degrees don't work. But there are other ways that self motivated people can learn and there are currently very few paths for those people to get recognition for their learning other than coughing up thousands for a piece of paper from a university and jumping through hoops. Personally I think we should have a lot more universities like WGU where you can just go and test out of exams immediately if you can demonstrate you already have the knowledge.