As many have alluded to, tasking levels from the COCOMs tend to keep MAF assets maxed out on what they can commit to. So when a flag exercise comes around, AMC will task and cancel and retask again. The average tanker bubba will see yet another TDY pop up on their schedule a week prior or so.
Juxtapose that with the fighter unit that has the exercise on the calendar for six months and actively planning for the last three. They want to do secret squirrel stuff, so no one in the MPC without a read in. The poor LT tasked as the planner gets a time, place and offload, and not much more.
That ends up with the tankers supporting the exercise without really playing in the exercise. Sometimes we do it better than that. Occasionally we even get something out of it. But most of the time we're just retasked and back in the desert.