It reserves selfishness for a handful of weirdos, and allows every worker to be selfless.

it rewards it in my view. it conditions us to be selfish

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.