Are those pings that require immediate attention? In my experience, no.
The vast majority of time in my career, if you have a minimum amount of decent planning, you won't get blocked because you can't talk to another person immediately. And on healthy organizations, even if you do get blocked, you can simply work on something else while that particular task is blocked.
If you really scrutinize all these availability claims, they pretty much all come down to lack of planning.
Planning for blockers, planning for communication gaps, planning for maximizing asynchronous work, planning for decisions that require specific people, etc.
So many people are horrified by the word "blocked" when it's most times an artificial block created by their own systems. If I can't move forward on something, I'll start on something else and come back to the other one later.