The only alternatives to a single source of truth repository are

A) multiple large, competing repositories

B) a distributed system like Go which relies on just a path to the source repository

Both of those suck. A) is messy and confusing, B) has a whole host of problems (no immutability, no reliability and assurance that the code will be here tomorrow, mandatory vendoring, ....).

Sure, a community driven non profit foundation in charge would be ideal, but a single source of truth, even if for profit, is much better than the alternatives.