KurtVonnegut

... Do you think workers in a car factory don't get paid until someone actually buys the car they helped build? All the devs have already been paid!

The constant revamping of the production process, the uninterrupted disturbance of all social conditions, and the everlasting uncertainty and agitation of society distinguish the bourgeois era from all earlier ones. All fixed, fast-frozen relationships, with their train of ancient and venerable prejudices and opinions, are swept away. All new-formed relationships become outdated before they can solidify. All that is fixed melts into air, all that is sacred is profaned, and people are at last compelled to face with sober senses their real conditions of life, and thier relations with each other.

-Some guy, in some manifesto, in 1848

I think it is important to take a critical look at past tragedies

Those who care more about past tragedies than current tragedies don't care at all. They're just looking for some excuse to feel self-righteous.

Lib - "Markets make everything cheaper, which is good."

Leftist - "But if there is a labor market, won't that make labor cheaper?"

Lib - "Yes, and that is good."

Leftist - "How is that good?"

Lib - "It leads to more profits."

Leftist - "But why is it good to have more profits?"

Lib - "Because a good country is when corporations make profits, and the more profits the corporations make, the gooder the country is."

Markets have brought more people out of poverty than anything.

Yes, just like the Irish people who were "helped" by the free market in the 1840s. Or the Indian people who were "helped" by the free market in the late 1800s. You might be interested in this book by the late, great Mike Davis which completely refutes your ideas with hard evidence that the free market can be used (and has been used) as a tool of genocide: https://www.goodreads.com/en/book/show/7859