Add to that the technological and qualitative advantage of western military assets, and Russia would need to carefully consider going to war with Europe.
Western politicians and the media love to highlight the military force of Russia and China...keeping us in fear loosens purse strings for military investment and sells newspapers.
But the reality is that Russia is outgunned. It is using Ukraine as leverage to stop NATO encroaching further onto its borders because western governments are probably not going to go to war for a country like Ukraine. Moscow must move soon, because that changes when Ukraine is admitted to NATO.
Ukraine needs to find a solution that includes neutrality with both Russia and the West.