Non-computer-simulated hospitals in Canada were over-loaded during the first wave leading people to quit. They say they are at the breaking point if they get another wave the size of the one in the spring. Numbers, not simulations, suggest the fall winter wave COULD BE worse. Maybe we will be lucky and that won't happen but we can't take the chance because our heatlh care system will collaspe.
We aren't producting or optaining enough PPEs or testing capacity or hospital staff to deal with waves larger than what we experienced in the spring.
Those are non-computer simulated PPE and testing shortages.
You said in another post that the world is pursuing an elimination strategy. No we are not. Most experts agree that Covid-19 is likely to be with us forever.
Canada is trying to slow transmission to a rate that the hospitals can manage. That is the only goal of restrictions. Not overloading the hospitals. Some regions have managed to eliminate it but they know it isn't permanent.
The spread cannot be contained by age and health status. It isn't just a small percentage of the population that is vulnerable. Millions of people live with chronic health conditions that are easily controlled by modern medicine. There is no wall we can place between people who are more or less vulnerable. The less vulnerable still have a risk of death or permanent disability.
Not only are there no real life models of that working there aren't even any computer simulations of it happening.
There is no huge number of young people demanding to be set free. A minority of young people flout the rules. Most are not begging for the on-campus experience.