The key take away I found is really not about margin but experience. If you lack true differentiation you will die a quick death in retail (this is more true of brick and mortar outlets thanks to internet competition being incredibly fierce)

High or low Margin is almost irrelevant to the point: if you’re a commodity trying to sell as a non commodity you will fail.

Quick observation: a lot if not most businesses tend to be commodities (e.g. they lack real differentiation from their competitors)