[Imp]

Would not say I agree entirely with what you say, do agree if I use air use it in force but even modern times as you stated Gulf War planes are great at destroying static targets & convoys as in supply chains. They did not however prove that effective vs units on the battlefield & it was not exactly a high tech air defence.
Planes main role still seems deep strikes vs infastructure to cripple supply & command which is beyond the scope of the game. Any ground support would also try & be done as moving to position rather than in battle as better kill rate.
Send an A-10 or 2 vs a column of tanks & rapidly setting up AA or to pick off tanks in a battle with freindlys about & I think one will be going home job done a lot quicker than the other.