In that it makes it open. In capitalism, ot is assumed that everyone is a selfish actor. Under communism, everyone is supposed to work together for the greater good, and when they aren’t, you can’t call them out, because they would accuse you of ‘undermining the unity’. And because they tend to be in positions of power, you will end up in the Gulag.
I guess, at least catholic christianity has the benefit of self-reform, given that they elect a ‘leader’. In theory at least, this should allow them to go with the times, even if currently, they are lagging behind multiple centuries oc progress.