It's not about RH at this point, it's about faith in the market. It's like you were winning at the casino and a cop came in, put you in handcuffs, then gave all your chips back to the dealer.
Market manipulation is not new, and it's not impacting most retail investment strategies, which are much longer term. This is exposing inequities in the market that have existed for a long time, but I would be shocked if it has a significant impact on the assets of retail investors. As others have said, what other options are there? The game is imperfect, but that doesn't mean everyone stops playing all the sudden.
I was able to trade GME all day on E Trade without a single issue.
Personally, not a fan of the casino metaphor.