Usually, capital flight from political or physical violence causes societal collapse. Yemen, Sudan, and North Korea are all examples of this. Russia got hollowed out when the war began and most young people with talent left to pursue a better life elsewhere.

You end up with people that either fomented the problem, or anyone else that can't leave. And it's rare to have people move back or reinvest in the region, which is risky. States have a lot to lose when you do stuff like ban abortion or queer people. People won't move their families if there is risk of them getting hurt or sick.