How conveniently you forgot about the most impotant things for a product to make money - marketing and the network effect....

I don't see the relevance to the discussion. Marketing is not significantly different for a shop and a online-only business.

Having to buy a large property, fulfilling every law, etc is materially different than buying a laptop and renting a cloud instance. Almost everyone has the material capacity to do the latter, but almost no one has the privilege for the former.