Yes, because of a simple reason - NATO will only defend its members if they didn't "provoke" the other side to attack. Poland is in a far too precarious positio

Yes, because of a simple reason - NATO will only defend its members if they didn't "provoke" the other side to attack. Poland is in a far too precarious position to risk anything that could be read as provoking Russia and therefore losing the protection of NATO - Putin would happily take Poland next after Ukraine. Giving the jets to US and then US giving them to Ukraine would avoid that particular issue, but US decided against it.