Because most people in Poland realize that if putain succeeds in Ukraine then Poland is, if not next, not very far back
Well then this "realization" is not correct.
There are many objective reasons why Ukraine deserves to get smashed, and many objective reasons why Poland will not be touched.
I will try to be brief:
1) As Kania said - NATO. Russians are not suicidal, and neither is NATO, I hope. Russia cannot go toe-to-toe against NATO in a conventional war, due to a huge demographic imbalance, large economic disparity, and so on. So then this war will have to be nuclear. Hence - not suicidal.
2) Ukraine is a core Russian territory. Parts of it, have been part of Russia for nearly a millennium. Poland is not such a country. When Poland was under Russia, it was always kept separate, with its very own unique conditions. If no Russian ruler in the last 500 years had the idea of joining Poland to Russia, why would the current ones suddenly have this idea?
3) At one point - a Russian ruler literally refused the Polish crown. This was Ivan the Terrible, the same guy that added a good half of Russia's modern territory. This is actually quite a good example of why Russia is reluctant to actually absorb Poland. Here are the reasons Ivan gave for not wanting the Polish Crown (for which apparently he had the most support of all the candidates):Ivan could not imagine that he had to fuss about the votes of Polish voters and also pay for them ...
If Ivan is suitable, then let Poland act as it should. Let them come to him and beat with their foreheads, like all those who come to him daily to ask for some kind of mercy.
He said that it was not an example for him that the emperor and the French king sent gifts to voters in Warsaw. In fact, there are no sovereigns in Europe who would have descended from a continuously reigning house for more than 200 years, except for a descendant of the Roman Caesars and the Turkish Sultan.
Everyone knows this, and Ivan does not need to beg for favors like others
4) Basically - Poles would be too huge a pain in the ass for Russia, to ever be worth it. Ukraine is as close to us as can be, and look what a sh!tshow that relationship is. With Poland being attached to Russia it would probably be quite explosive indeed. Again - this is why Poland has always been kept separate, even when together with us. While Ukraine was treated quite differently.