[electroly]

This is for Russian websites serving Russian customers, using TLS certificates they had previously sourced from outside of Russia. Because of the sanctions, those websites can't pay to renew their certificates, so this Russian CA offers them domestic-sourced certificates that they can pay for. I'm certain they have no expectation whatsoever that anyone outside of Russia would install this CA certificate; it's not the point of this.

A ban is unnecessary; the websites don't work in other browsers. Switching to a Russian browser or installing the CA certificate will fix the websites. That's what Russian users will do if they want to continue using the websites. You don't need to use the stick when the carrot already exists.