Some quick points
1.Personally athletes are not responsible, but as citizens they are. This is how society works, you may hate the government but they are still acting on your vehalf
2.Why would anyone wish to deal with the drama? They win, expect them to be standing on a central arena singing alongside actors and media stars in support of troops, they lose, expect the "West is big satan, they have killed us with their referees" etc
Not to mention all the additional security measures
3.Russia can always organize a tournament with friendly countries. Superseries with Belarus sounds fun