I sound agree price isn’t always the best factor to determine a monopoly.
Walmart use to go into a town, sell everything cheap and drive everything else out of business.
It’s one of the many reason I hate Walmart.
Growing up we have a cool downtown area. It wasn’t big but had a bunch of small stores. They all closed within a year of Walmart.
Wal-Mart does a lot of things I don’t agree with. Their labor practices along with their sourcing and many other things make them the last place I will shop.