Without advertising (or marketing of some kind), how do you propose for any new product to EVER reach a store shelf.

You convince the store owner in person, this was kinda the case throughout all of humanity until very recently.

It's not society's problem to ensure corporations are able to take prime real estate by abusing their customers.

They can meet with every shop owner and argue why their products should be sold, although if you ask me I bet the shop owner knows exactly what their customers want so once again where is the benefit for society here? That some greedy people aren't able to make a buck abusing human psychology?

Once again, what is the benefit for society here?