We have access to an overwhelming amount of knowledge, but the problem is that this by itself is not enough to use it. All that knowledge is in a format that is difficult to assimilate and largely lacks the social aspect needed to transfer it effectively.

Humans assimilate knowledge by participating in social groups, most of us acquire it largely by imitation; only some complex academic subjects benefit from isolated personal study, and even then you need a mentor to guide you through it.

The wealthy remain wealthy because they maintain exclusivist institutions, devoted entirely to transmitting such limited social knowledge to their families. It is practically a requirement in order to improve your social standing; people with access to unlimited knowledge but without having the tribe to guide them in its assimilation cannot harness it in a way that is more effective than the people they are competing against.