You are so smart, why don't you tell us all the better solution then ?
The only thing I can think of is facilities being built, and supplies being stored. It beats having a triage in the high school gym, no?
Now, another problem we run into: Who staffs them? There is only one answer: the military medical staff and foreign volunteers. "Doctors without borders", etc. Unless these events stay so localized that we can shift our own resources. But even these resources are limited. Military medical staff doesn't just sit around and do nothing. They have other jobs at bases and hospitals were there will also be patients. So, what now? Who produces the staff, if, say, hospitals in 10 States are overwhelmed?
These are tough questions, right? Guess what facilities exist and are staffed? Nursing homes. You haven't seen the last of covid patients going to nursing homes. And guess where much of hospice is located? Yep...nursing homes. So now you have the "round trippers", who are hospitalized, then sent to hospice to die.