> Most young people with a conscience (which is most people that like to read) leave

No. I am sure that most young people with a conscience remaining. And it is mostly people without a conscience who leaving.

Russia is an extremely poor country, and literally governed by mafia. So generally it is impossible to leave Russia if you are not in top 10% by wealth, and it is almost impossible in Russia to get in those top 10% if you have conscience.