One of the things I’ve noticed is that when leftists say “capitalism” they often mean “the ability of capital to set the rules of markets” rather than just “markets”. This causes people who use the latter interpretation and leftists to talk past one another quite a bit. Which is one of the reasons that leftists have sounded this alarm bell for at least twenty years and no-one has paid attention.
When leftists say "capitalism" they mean something closer to what conservatives and free market libertarians mean by "fascism."
Capitalism is a big money party. Leftists are the party poopers, actually just slightly less drunk than the rest of the guests, and pointing out that lighting up fireworks indoors isn't a good idea. Booo-hooo, shut up lefty! *BANG*
Command economies break too. Capitalism has occasional fires like a forest. This is good. It allows things to shake out. New growth comes from the destruction. Command economies don't. They just continue to grow weeds and tall trees until everything is choked. Then they wonder why everything is garbage.
The US is moving to a fascist economy. That is a form of command economy. For example the FDA is controlled by big pharma.
Capitalism with the ultra-wealthy is functionally the same as a command economy.