Nobody was bussed into Kiev for anybody except for the Ukrainian people. It’s probably best to listen to Ukrainians about their country and what they want. Life under Russia is torture and death.
Putin doesn’t care about sending people from Russias regions to die in Ukraine so if he took Ukraine he’d have millions of new cannon fodder to use against Europe and NATO.
Even if they didn’t invade NATO countries they’d control Ukraines food resources that much of Europe and the world relies on on top of the energy resources. He could then use that leverage to isolate the US further from your European allies, preventing us helping in the fight against China.
China could then take on the US in their own region and gather up more resources including microchips etc in Taiwan.
Allowing brutal dictators to win wouldn’t end well for people who like freedom and democracy.