I somewhat agree with you. But let's consider a normal supermarket (in almost any country in the world) 80% of the aisles are full of junk and literal poison: Sugared cereal, soda, low quality beer, hyper-processed snacks and cookies, frozen slop food, etc.

Then furthest in the back you have the fresh produce: Eggs, vegetables, meat and chicken, fish sometimes, dairy and bread. The good stuff.

Now look down the shopping carts of your fellow shoppers: Filled to the brim with big boxes of the most unhealthy sewage on offer. They are subsidizing your shopping for quality ingredients from near and far.

I think it's the same with other stores. The low quality junk that appeals to the average shopper is subsidizing the quality niche item that you need to buy.