The theory I've seen is that there could be hidden systemic risks here. If GME tanks suddenly, there's some possibility that traders bailing out of their trades will take down Robinhood (who doesn't seem to be very healthy right now), and a major broker collapsing is never gonna be great for the market.
I share your skepticism that it would actually happen this way, but it seems at least somewhat plausible.
Robinhood are tiny on the brokerage stage. Important to retail, barely matter otherwise. That’s my understanding at least
That seems consistent with what I've read recently. Good news.
It's got nothing to do with Robinhood. If a hedge decides to cover the short so they don't have to admit defeat and go bankrupt, then the entire market goes down because they'll end up selling thousands of unrelated shares for their cover.
You've fallen victim to some common misinformation that's spreading. Multiple hedge funds have already been able to cover their shorts, and there's not much reason to believe this will change.