For example, Amazon cannot swoop in and sell a cheaper Amazon Basics version of a product to which you own a critical patent.
They are really saying, though, that without barriers to entry and in a competitive market, players that don't innovate don't survive.
The problem with that is that this is not a competitive market, so the player that wins is not innovating, they just have market power because of their size.
That is the definition of winning a competitive market. The consumers win.
You don't need to have lower prices long term if you control the market.
I get the argument, but it's a grim reaper strategy taught in econ 101. It's a well known strategy and completely valid.
Consumers win in the short term but lose in the long term. Except they can just consume different products or wait for someone to re-enter the market.