But, the latter two points aren't really about Reddit or training data at all. They're about model alignment and social epistemology. Much broader issues. It just feels disjointed.
I was never big about reddit anyway but now I will definitely never interact with that site again.
It pops out of the Explore-Exploit Tradeoff. So we end up with separate spaces like academia, labs, studios etc. See how the story ends for Socrates, Plato, Aristotle, Galileo etc. Tale as old as time.