The alternative is that Russia rolls over Ukraine, murders between few hundred thousand and few million people to enforce the occupation, and then decimates Ukrainian male population by using them as cannon fodder against Poland and other European countries. Please explain me how this is any better.
Even during the WW2, a few countries capitulated with the germans and survived, even eg. france. On the other hand, a bunch of those countries (even france), no go half a planet away to kill people over there, and there is no support to those countries to fight harder against the french. And france is far from the only country that does that in europe, not to even mention the USA.
As to France and other countries occupied by Nazis, capitulation meant a ride to death camp for some, slave labor to others, starvation and oppression for all. France was used as a staging ground for the Battle of Britain and for the aborted invasion of British Isles, and served as a base of operations for submarines attacking allied convoys in the Atlantic ocean. France didn't regain freedom until massive landings on Normandy beaches and fierce fighting through the country by soldiers who were mostly conscripts and not there on their own will, so I don't understand what it was meant to prove.
Considering the sitation in ukraine, we've wasted a lot of money and a lot of ukranian men for what exactly?