To reason, to justify, to persuade, is what it means to “think critically” on a social level. You don’t need to have exclusive rights over one function to claim it as your own; rights of property don’t extend that far. Others would like to know what the humanities can do? Tell them every reason you can think of. Don’t be. Don’t shrug them off. There have been political benefits, their has been moral benefits, pleasure and enjoyment, but often times quite the opposite. The humanities is many things to many people and that, and only that, is what makes it so valuable. There is no reason to pick on thing that the humanities do, and then preclude everything else as a false argument.