It’s the same argument you see people make for anarcho-capitalism. Same issues, only that socialists are afraid of admitting that anarchy in general simply doesn’t work (on a scale that would represent modern countries).

First off, how do you prevent people from returning to a capitalist society, forming their own states or even ensure the core idea of equal distribution? What do you do when some start working more, produce desirable items and thus accumulate more wealth than others? As soon as you start using force to prevent these things, you’ve created a state and are back to square one.

Anarchy is only feasible amongst likeminded people, but the broader society is anything but likeminded. So the solution to this issue usually is “educating” the people (which doesn’t work, as Atatürk’s failed attempt of educating his country in liberal democracy demonstrated) or killing them (which I unironically saw being suggested here on Reddit), since that’s somehow “the lesser evil”?!