I don’t think that argument will convince any leftist.
They believe that human nature is inherently good (THE basic wrong assumption),
and that with the right structure (ie, force) in place,
that inherently good human nature will flourish.
So, your argument is actually SUPPORTIVE of the left’s view of communism.
Hahaha...heck. I don’t know why I am laughing. Liberalism is built on so many faulty basic premises, and we have let them get away with it for years.
I think Ann Coulter once said something to the effect that they take a faulty premise and build a huge, monstrous edifice on top of it, and we crash against the edifice instead of digging at the faulty assumption.