That's true in many many instances. It's also untrue for many many people. It all depends on what you do and how you measure success. There are plenty of jobs and fields which you simply cannot enter without a degree; and there are plenty for which it makes zero difference.
MM
Couldn't agree more. If I had to take a side, there is no doubt in my mind that a degree can help you get ahead. But is it no guarantee of anything at all.