I should say that Hume did leave open the door to the possibility that, given the right circumstances, everyone can recognize objective beauty (in which case a hierarchy of taste might still exist, but not as a domain to be apprehended by a few, rather than the many). But he considered those circumstances rare, and susceptible to interruption (both extrinsic and intrinsic to the person). So that, to his mind, only those in possession of a certain kind of palate (he sometimes used the word ‘organ’) are able to apply the ‘standard of taste’ with constancy. Which isn’t to say they always will. They will or they won’t, depending on how capable they are of maintaining a virtuous disinterest with regard to the object in question.