If your mitigation of Robinhood's culpability would apply just as straightforwardly to an actual casino, that's a damning statement about what Robinhood is.
But all of these trades are just as possible in etrade, TD Ameritrade, etc. In robinhood, your trades even have to be cash-secured so your downside is capped to your deposit amount. The futures account I have on TD Ameritrade is much riskier than RH...