I'm not saying they "can't make that choice". I'm saying it's a bad idea to make that choice. If Russia tried to invade Sweden, my home country, I would say the same. Resisting an overwhelming force might sound good on paper, but when it's your own country that is being laid waste to it's different. If Finland tried to invade, fighting back would be more attractive.

The comparison with Poland and the Nazis is not an apt one. The Nazis despised Slavs, and life under German occupation would be terrible, WAS terrible. Unless you believe the craziest Western propaganda, you know that Russia has no plans to set up concentration camps, Russians consider Ukraine a brother, not a lesser form of human. If Ukraine waves the white flag Putin will most likely install a loyal government, peel off DNR and LNR, keep Crimea, establish some Russian military bases and then leave.

Life in Ukraine as a Russian vassal state would be nothing like life as a Pole under Nazi Germany, it's not a reasonable comparison. It would be more like living in Belarus. That's not amazing, but it's better than total destruction.