Problem is that people ARE going to walk away and find another job. You can't quickly replace the experience they walk away with by hiring someone off the street, so you end up with a less capable force and more guys are going to die in wartime and training accidents. Sport bitching is one thing, highlighting issues that will hurt our ability to safely execute the mission is another.
Guys are bailing on AD to the guard to get family stability and be home more. If the guard goes to a 1:3 with 180 day rotations for fighter units (180 days are already happening), that will no longer be true and more guys will straight up separate. I already know multiple fighter guys who's fini flight on AD was their no shit fini flight because they saw the guard as more of the same. A 1:2 AD dwell time sucks, but for many guys that really ends up being more like 1:3 or 1:4 after skipping deployments due to PCS's, school, etc. That doesn't happen nearly as much for part timers, so they may actually end up deploying as much or more than their AD buddies.
There's also the civilian job issue. Airlines and other companies may not be able to fire guys for deploying for six months every 18, but if that military guy is a private practice doctor, lawyer, or small business owner, who is going to force their clients to come back when they return?
The active duty pilot exodus has begun, but if the guard and reserve isn't careful, the same might happen on that side in a few years.