Learning your own doesn't give you a grade or diplomas to prove how much you've studied.

Another benefit of the degree is the already plannified roadmap, taking it's time to learn the basics in depth. And, of course, the teacher who answers the doubts that are coming and shows the advanced tricks he already know.

Definitely, learning in your own is a good choice if you don't plan to work on infosec jobs. But without a grade the most tech job I can find in my country is formatting broken windows machines, installing printers and routers, and no much else.