There's no point pretending there wasn't repression within the USSR. it was liberatory in many ways but it was a limited revolution and an imperfect system that should be criticised rightly for its failures and mistakes, and celebrated for its successes.
It wasn't like the USSR was explicitly trying to revolutionise people's views on sexuality, it's just that they didn't see the need at the time to spend the manpower targeting sexual minorities. Once the instability was over those same people probably held the same views as before.
TLDR: I would, and do, believe it.