[jacknews]

"If prices forever stay low, then consumers ALWAYS benefit, right?"

Not necessarily. The system is much more complex than simply "low prices = good".

Markets are an ecosystem, if you allow one retailer to dominate, they will exert control. That could be by hiking prices, or it could be by picking favorites among their suppliers, deciding which products are "suitable" and so on, and by squeezing suppliers, possibly to the point where the result is stagnating quality and innovation, as suppliers race to the bottom on price alone.

Quite apart from consumer political issues of having such a dominant presence in the market. Eg, if they refuse to serve you for whatever reason (or serve you badly, perhaps with "custom" pricing), you are disadvantaged.

The consumer ultimately loses in this long game, and it should go without saying that enabling a monopolist, even one with low prices and supposedly a focus on "customer satisfaction" (though is that merely a vector for dominance?), is likely to end badly.