Tooth paste manufacturers stack the shelves with multi purpose pastes, all claiming to be different, in order to sell these potions they have to create a demand for them.
One way to do that is to create a non existent condition, then claim that their product remedies that condition.
Sensitive teeth is one such example of a non existent condition. Mankind has survived for centuries without the sensitive teeth; yet, within the last few years, we are being bombarded with adverts telling us that we suffer from this non existent condition.
Utter nonsense, there is no such thing!