Sure, bitcoin cannot be banned but let's say the U.S and the EU decide to ban bitcoin just because Russia is using it to avoid their sanctions (or at least use that as an excuse), what do you think would happen then (if we're talking about the price)?
You just created a situation that can be possible when we look into the way Putin and NATO are going about this war with their ego on display. If the EU and America decide to go against bitcoin as a way of getting back to Russia, that will a big blow to bitcoin community and adoption. No one wants to see that happen. It will wipe off years of gains from the whole bitcoin struggle. I do not wish that happening.