Here's how I think of "collapse": you suffer some serious injury or illness, you call for an ambulance and told that none are available. You get a friend to drive you to the nearest A&E department to be told to come back tomorrow as there's no room left. You drive to another to be told the same.

This is all entirely possible in 2020 to 1000s of people, and I still wonder why people think lockdowns are a bad idea.