If one is thinking about not getting a degree and trying to go straight to work, as someone who did so (albiet out of poverty rather than choice) but didn't end up like Zuck, please heed my warning: Social capital matters more than just about anyone who has a degree can understand and tell you or mentor you about, because the majority of them have always had it, and they tend not even to interact with people without…
This is completely correct. It's the same reason why an MBA or PhD can be valuable if you want to go the management track. In Europe specifically - especially in the UK - the class based system is still alive and kicking and is based on subtle tells such as education, name, accent and more. It's less overt than in say India, but still very much present.
I resented being constantly 'corrected' on the local accent I was picking up from school as a child, but now I appreciate that an RP or close to RP accent turns down the difficulty slider in certain British interactions.