Not doing it would have resulted in Robinhood being declared insolvent and entered into receivership at the close of trading day. All investment accounts would

Not doing it would have resulted in Robinhood being declared insolvent and entered into receivership at the close of trading day. All investment accounts would have been frozen for at least a year as the insolvency is unwound. Financial firms (including brokerages) don't go through "bankruptcy" like other corporations. They are liquidated during the nightly clearing process. The SEC report says the short squeeze drove the initial price action, but retail attempting to chase the short squeeze drove the majority of the price increase when RH was shutting down trading. (Graph on page 28 or 29 of the SEC report shows this).