You can say “But communist regimes are authoritarian blah blah” all you want, but that doesn’t change the fact that capitalism has zero answers for the most important problems facing our species. This still needs to be addressed, and moaning about Mao and Stalin isn’t an answer. Don’t like the iterations of socialism we’ve seen so far? Okay. Then find another answer, and remember we’ve already established that capitalism is not an answer; it cannot address the problems we’ve discussed here. So we need to find an actual answer that does actually work.
Dismantling capitalism, if we ever achieve it, will be the most difficult thing that humanity has ever accomplished. As hard as everyone becoming a buddha, and essentially not much different. But that doesn’t change the fact that it is existentially necessary for us to do so.
We’ll either move from competition-based systems to collaboration-based ones, eliminating all the obstacles necessary for us to do so, or we will go extinct. We are at our adapt-or-die juncture as a species.