The game is for keeps.
Thats is why Poles want to keep helping Ukrainians. Most of us don't fight in this war (except for some volunteers) but many support Ukrainians because in their present we see our past experience.
Poles also fought long and hard to be free of Russian dominance, corruption and terror. Our ancestors who participated in this fight were sometimes exiles or war refugees. After many lost battles we finally managed to win our independence in 1989 and were finally able to choose our destiny, this time without Kremlin's meddling.
We believe every nation & nation state should have the right to choose its sovereign path. Today Russia is once again indulging in its imperial fantasy and trying to subjugate Ukrainians, and so we support their fight for what we can already enjoy: freedom to make our own choices. In comparison, subjugation may seem a simpler, less painful path. And yet, if they choose to fight for the right to choose their own destiny, we feel they deserve our support.