Some ads clearly are art. Speaking of Apple, their 1984 ad was very much a work of art. Things can have more than one meaning and purpose.

Plenty of artists make art for commercial purposes. In fact, that's kind of the dividing line between "professional" and "amateur" artist.

The romantic ideal is that art is not about consumption, but the reality, both historically and currently, is that art objects are by and large made to be bought and sold. If you disqualify all works meant for consumption, you would have very little left that we currently recognize as art.