In reply to:

Nope - no irony in the delivery. Just an imprecise grasp of the concept of "cure".


Are you sure? Perhaps it was a deliberate play on the old aphorism. It was pithy and apt. It was also memorable, for most because it's short, and to the point, and to prescriptivists because it "misuses" cure. Either way, it sticks. Maybe that was the intended purpose.