To my ears, this "cultivated disinterest" label comes off as something of a cheap stereotype. Simply put, not everyone who lacks interest in professional sports nurtures a "cultivated distinterest" in the subject, nor are we driven by some need to display this disinterest as some kind of marker of class rank or intellectual superiority. We simply lack interest in the subject, period.
And when pressed on the subject, I never use language that conveys any sense that I think others are stupid or shallow for being interest in professional sports. If anything I just say, kind of sheepishly, "You know, I actually don't follow professional sports", or something to that effect. And surprisingly, this kind of honesty has, itself, sparked interesting conversations with people, on several occasions.