How is that supposed to be a great explanation?
It's already been pointed out the Avengers don't care what the government wants them to do or not do, and saying the Avengers see the X-Men as something like Hydra or Aim doesn't quite make sense when there are a few Avengers who used to be X-Men and many who generally on friendly terms with the X-Men.
As an explanation it doesn't work at all.
A better explanation is to acknowledge events in Avengers books as happening as the same time, like currently the Avengers are trapped in space and Iron Man is trapped in the past that's already a good enough explanation for why if something happens right now why they weren't involved.
A good amount of people already think most books released at the same time take place at the same time so it makes more sense to use that.