Military jets are an opportunity to hit long-range targets and many.

They are, but in the current theatre of war, Russia isn't presenting any that could be easily hit by a jet but not by something else. What Ukraine needs more than jets is more ability to shoot them down (anything with the words anti-aircraft in its name). Jets would have been great to have BEFORE the invasion, when there were still a large number of airfields from which to launch them.

My military knowledge is about a decade out of date, but that's the way it looks to me.