The problem for people starting in the world of work in the USA is that its very hard to get a job that pays real money without degrees, certifications, and contacts. Its also much easier for most people to do the 'looks good feels good' thing if you know you have been successful and well paid in job X, and job Y would be similar. So once you are established in an industry your experience and self-acquired skills matter more than your degree, but getting in to that industry is hard And the housing shortage in most rich countries makes it hard to spend 5 or 10 years trying different things until you establish yourself in an industry that works for you.

Sure. People who have no signals (including contacts and credentials) have trouble lining up jobs other than (and maybe including) fast food. People need signals for professional work which include degrees and various sorts of credentials. I'm not sure it's much different anywhere else in the world.