If you can make a good pharmacy that is 10x better than any other in town, you probably can grow to other towns. But what makes you 10x better? Some good procedure that is copyable, or your personal management skills? It it's procedure, the competitors can copy it also, so this growing point is kind of invalid. If it's your personal management skills, this growing point is again invalid.

In good competition there should be a threat of someone growing big because they make things better. So pharmacies would copy all good procedures from each other. But that growth should never actually happen.