But if Robinhood has some preexisting deal where they have to loan out X% of long shares to shorters, why should they have to take on the risk of defunct shorte

But if Robinhood has some preexisting deal where they have to loan out X% of long shares to shorters, why should they have to take on the risk of defunct shorters if it is within their rights to just stop allowing trades in the symbol, without any goal of overall price manipulation?