More fundamentally--if a good product keeps a customer coming back for more there's an incentive to provide a good product. If a happy customer doesn't have any reason to come back there's no value in creating a happy customer.

Note that "come back" needs to be interpreted broadly. For example, a Osprey backpack--lifetime warranty against most anything, doesn't look like there's any space for repeat customers. But--those of us who would buy something like that very well might want different sizes. And I would certainly recommend them to others who were in the market for a serious backpack. (And, yes, they do honor the warranty--had a buckle snap, I sent them pictures, they offered to repair it, or ship me the part and I do it myself. Took the latter option, a few days later I had a strap and buckle that I threaded through my pack, good as new other than the color didn't match.)