Not because they trusted their scientists to be able to do it though. They used the plans stolen form the US instead.
https://en.wikipedia.org/wiki/Klaus_Fuchs
Adding to @eastbound's comment the Soviets were also responsible for the first remote operated "robot" on the moon.
Not sure what relevance the space race has to this topic either!
That is quite the claim !
When applied to medicine that same attitude becomes parasitic: you may be able to make much more money by restricting the distribution of the knowledge that could save people or prevent their suffering. This is where Martin Shkreli and other such characters come in to play.