That is certainly one possible outcome. However the Tories seem rather convinced that they can keep and even increase their majority (although the Tories do seem to have a thing for taking big bets with the country on election outcomes). And if they end up even just keeping their majority it will remove the whole "Theresa May has no public mandate to negotiate Brexit" argument from the table. It will also give them 5 more years to ride out the Brexit storm before having to face the voters again.