This is a disadvantage for everyone, Hommy, because when a person cannot have their own perspective on philosophy and must adhere to the generally accepted one, that is a disadvantage.

Religion forces adherence to the generally accepted just as much as its absence does.
It is better to never elevate any religion to the state level. But a state should have an ideology, even if it is generalized; otherwise, what kind of state is it? For example, in the USA, people believe in money. And the ideology is achieving the American Dream. But what does Russia have?... It is better to prohibit something for everyone, as they did with atheism in the USSR (different cultures simply cannot be united), than to reap the fruits of one's own stupidity later. Every person should have a Temple within themselves and never bring it to the state level. In the USSR, no one prevented people from believing in God in their own homes. Even now, icons remain in the corners of houses in villages. God must be carried within oneself. And taking everything out of everyday life is already a sect or just a show. All IMHO, but still...
Therefore, in the USSR, they did the right thing by imposing atheism, because those who truly believed could not be dissuaded in any way, and those who doubted were only helped to find a stable point of view