Who the civilian leadership of the United States opts to go to war with is not the question about whether electronic warfare airplanes serve a useful purpose in a wartime situation. You might try focusing on the question.

In retrospect, Viet Nam was a useless war ... agree on that one. But you apparently aren't bothered by Iraq taking over and killings in Kuwait, Al Queda and the terrorist attacks on 911, Pan Am Flight 103 blown out of the air over Scotland, an ISIS territory and Americans and civilians murdered in Syria, etc.
Well, you are entitled to your personal opinion on what nationalistic behavior is acceptable in this world. Don't go to war unless our actual physical territory is bombed or invaded, right ... terrorist bombers like 911 don't count.