Oh man. Doesn't make any sense. At the start he says the bucket represents the population who all has the capacity to get sick. At the end he said the bucket will stay full, but it will only stay full if everyone in it gets infected due to not quarantining early. He is just assuming everyone in the bucket needs treatment, that wont happen if you stop the spread. Isolating people is the only possibility to stop the spread. "Slow it down when we really need to"? Infect everyone, then quarantine them? What will that slow down? Nothing, as a lot more people will be sick at the same time, with no treatment available to many. It will kill more vulnerable people than necessary.