May have something to do with modern capitalist nations taking economic action against modern communist countries, at least in part. Not that they don’t have their own issues caused by an unreasonably sensitive transition.
I feel if you assume the good will which a communist society would need to flourish, a capitalist society would also be egalitarian under similar conditions.
Capitalism encourages and even requires antagonism, so even if people started as good, it is difficult to maintain that in the population over generations. In communism, the reward for being greedy or lazy is insignificant. I wouldn’t go so far as to call myself a communist, but I would say that I’m cynical of capitalism.
Not if you assume people will be altruistic and that the system will not be corrupt, which are the assumptions people make for theoretical communism. Then it too can be egalitarian.