>capitalism wasn't some guy's idea that then got forced on the rest of us by governments
Marx has interesting words to say about that.[0]
>given a high enough degree of freedom
Except for the freedom from having to sell labour-power for a wage in order to receive means of sustenance at a rate below the value you create? Sure. You also get the freedom to choose between which capitalist you work for. Now that's what I call freedom. (I'm being facetious :))
>is not like Marism and friends in this respect
It's worth noting that Marx's own vision of Communism is not that of one that is forced, but rather one that comes naturally from history, it is a stage of development like any other. By the time capitalism has reached the end of its life, there will be no need for force, other than to overthrow those owners of capital, and to return that capital to the people who gave them value - the workers. That said, Marx and Engels did specify a governmental policy program for revolution, that is, to enact policy either by revolution or within the current state apparatus (bourgeois democracy), to the point where the state must wither away.
The free market has its origin in capitalism, or by extension the pre-capitalist class systems, and with the end of what capitalism requires (the class system, owners of property) so will end the need for the free market. The Hegelian Marxists use dialectical historical materialism to show that (though I don't know enough myself).
The freedom I talk about is much beyond what is available now, it is the freedom afforded only by Socialism, as Oscar Wilde noted, which many people do not have today. His words from the 19th century ring as true today as they did then.
"Now and then, in the course of the century, a great man of science, like Darwin; a great poet, like Keats; a fine critical spirit, like M. Renan; a supreme artist, like Flaubert, has been able to isolate himself, to keep himself out of reach of the clamorous claims of others, to stand ‘under the shelter of the wall,’ as Plato puts it, and so to realise the perfection of what was in him, to his own incomparable gain, and to the incomparable and lasting gain of the whole world. These, however, are exceptions. The majority of people spoil their lives by an unhealthy and exaggerated altruism – are forced, indeed, so to spoil them. They find themselves surrounded by hideous poverty, by hideous ugliness, by hideous starvation. It is inevitable that they should be strongly moved by all this."[1]
[0] https://www.marxists.org/archive/marx/works/1867-c1/ch31.htm
[1] https://www.marxists.org/reference/archive/wilde-oscar/soul-...