You are arguing against international trade and economic sanctions though, by saying it inconveniences Russian citizens while ignoring the Ukrainian citizens who are being killed.
Officially removing your business from Russia is a form of boycott, and it does hurt the oligarchs who own the businesses who use the registrar.
Something like kicking every Russian person off of a web hosting platform does not hurt those in power most. Anyone with enough resources to matter in Russian politics will have enough resources to simply employ someone to move everything over and this will barely register as a blip. This probably impacts random citizens 10x more than the people in power.