Poland loves the opportunity to bloody Russia, but they also love not being the ones to be bleeding for their sovereignty.
The rest of the world, at least the ones that stand to gain by weakening Russia, should absolutely follow in their footsteps.
Some idiots in the US have been crying that we've sent 1/3rd of our Stinger stocks to Ukraine, as if 1) the stinger is a desirable anti-aircraft platform and should be pushed as a mainstay of American defense, instead of an oldish system that could use a serious upgrade if we wanted it to be useful in a peer conflict, and 2) America actually relied on stingers at all, and didn't have the two largest air forces, designed specifically to murder peer adversary air forces.
Remember, as an American, your safety comes mostly from everyone being very far away. We could sent Ukraine our entire air force, and even though they wouldn't know how to use it, America would still have the largest air force in the world in our Navy! Anyone bitching about depleting our own defensive capability helping Ukraine is not arguing in good faith
There is usually not much of a choice. My ancestors from a nobility family (schlyahta) of Grand Douchy of Livonia from before the union with Poland were fighting Moscow Dukedom and later Russian Empire for half a millennia, with for example a far relative being among the leaders of the 1863 Polish uprising. (To their would be dismay i grew up in USSR and was for many years a "Great Russia" chauvinist, a disease very hard to treat :)
Strategically speaking, Moldova and Baltic states, which Russia wants very much too, automatically become an easy prey in such a scenario. Russia really hates and very afraid of Intermarrium or anything resembling it. And Putin promised Lukashenko Baltic ports. Basically Russia is trying to make 4th partition of Poland and it starts to look like West Europe, though fortunately not US, start to give a bit of consideration to it.
Most probably Poland will get baited into the fight outside article 5 when Russia starts butchering deep inside Central and West Ukraine.