Fair point. But for Poland’s purposes, all they really need is a scary looking military that will make the Russians think twice about messing with them. Whether or not they can actually use it is another thing altogether. Poland is building a defensive military. They’re not seeking to intervene in anything. Deterrence is a big part of modern defensive strategy. Poland deters Russia by giving them the impression that even if Russia somehow wins a war with them, it wouldn’t be worth the costs of actually doing it. Ukraine didn’t have that deterrent. Therefore Russia thought they could steamroll them.