The military needs to plan for the worst case scenarios, not the best. Ask the Ukrainians how it feels to be on the short end of the stick. The Russians are doing a bang up job with ECM/ECCM and denying them any airspace to fly in. The US doesn't need to plan on fighting tribesman in the Hindu Kush. Almost any aircraft can do that. It needs to plan to fight peers.
Seeing as how the last time the USAF operated in seriously contested airspace was forty years ago, this is perhaps not as big a problem as it would seem.