Well, Marvin, if it's taste that matters to you, then fine. But the nose is a far more sensitive instrument than the tongue (or so they tell me--mine is terrible), with the ability to discern far greater variety of sensations. If people enjoy smelling as much as tasting, why shouldn't they?
It was noted here some time ago that Johnny Depp is supposedly in the habit of buying a dram of Lagavulin, which he enjoys nosing without drinking at all. Okay, he's weird...but it does illustrate the point that people enjoy the nose of whisky.