The moderator to user ratio on the fediverse is orders of magnitude higher than commercial platforms. Even Lemmy.world (a large, loosely moderated Lemmy instance) has again, orders of magnitude more eyes on its content than reddit.
This means that even if a chatbot gets invented that is impossible to distinguish form a human, mods will more readily be able to tell if it is pushing a narrative/shilling products.
“any media outlet, no matter how big an empire it is, that is not owned or funded by the state” is not the common definition of “independent media” (it’s not even the definition given in the hyperlinked definition). “Independence” in this context refers to journalistic independence.