It's possible that the USSR would have been a better system, had the cold war not happened, but that's not the world we live in. If you want to make that argument you have to explain why it's reasonable to excuse how the USSR turned out in reality, and why in your hypothetical world it would have turned out differently.
With respect to space advancement, I suspect the main reason for sustained differences in accomplishments come down primarly to the amount of resources each were able to devote to space. The US was able to sustain a high level of investment for a long time, and the USSR was not.
You go on to state that Russia beat the US into space (which is a non-sequitur), and later expand that "The USSR, had it not had to fight a cold war against the US, could very well have been a much better system not just for space flight, but for a way to structure and run society in general."
When challenged by alentist, who asked "why did the USSR and its satellite states have to systematically mass murder people who wanted to leave this wonderful society?" you countered with "If it was such a bad way of doing things, why did the US actively go out of it's way to sabotage it" which is moving the goalposts, and starts to slide into whattaboutism.
Specifically you claimed that the USSR "could very well have been" a better way to structure a society, and alentist provided strong evidence that it was not - people were murdered when they tried to leave. Instead of trying to prove your point you deflected, and shifted the goalposts from "this could very well have been a good system" to "the US didn't like it therefore it couldn't have been bad".
Still, it would have been better not to restrict emigration. That was not humane, and betrayed an antiquated view of how the world works.
https://capx.co/soviet-communism-was-dependent-on-western-te...
Your question, on the other hand, is silly. Substitute the USSR with Nazi Germany.
If you're saying that slavery is also abhorrent and evil—like the slavery and mass murder that takes place under Communism—then we're in agreement. Now, can you please answer the question?
If the USSR had such a wonderful society, why did they have to systematically mass murder ordinary people who wanted to leave this wonderful society?
Let's try again:
If the USSR had such a wonderful society, why did they have to systematically mass murder ordinary people who wanted to leave this wonderful society?
Don't deflect. Don't evade. Answer.
To our fellow readers on HN: notice how alentist himself cannot answer a question asked back, even though I have given him the answer to his question directly multiple times. It is his attempt to save his narrowly constructed world view that he is right, America has never committed atrocities against its own people and others, and you should accept his point of view matter of factly without questioning! Notice how he acts more like the places he criticizes than I do simply for questioning his assertions?