I didn't assert that. Any brokerage that uses a provider for settlement was taking on additional untold risk (including Schwab). Schwab, in theory, has enough assets to cover something of that size of trading GME introduced but their clientbase isn't the same as RH, so the reputational risk was much lower. It was a precautionary move, not a "our company might go under and we're gonna piss off our key partners" type of move.

See my other note - you're wrong about the nature of restrictions and level of impact on Schwab vs RH (and other brokerages for that matter).