Can someone explain how the outbox model fixes this?

My understanding of the outbox model, is if 80% of people are only using the top 3 relays, because they're using the Twitter/Google/Facebook clients that only post to those respective relays, and their rationale is, "I don't care how it works. It gives me a wallet, looks pretty, is intuitive, and it always works" I could choose to ignore those top 3 relays, but that means I'm not seeing 80% of what's out there, and 80% isn't seeing me.

Maybe I'm misunderstanding the outbox model though.

(I would argue not being engaged with 80% of what's out there is not necessarily a bad thing, unless my goal was to reach the masses with my shilling)