The problem is not how much you can have infected person, but how you can STOP the spread.
Many with mild symptoms in U.S told to be voluntary isolated in their own house.
Which very dangerous, because it can infected other family members in that house and also infect their neighbours and delivery courier if they order food or something.
If they are not discipline and go outside, it will infected many more people.
That's why infection rate in U.S so HIGH
Meanwhile in China,
They make many makeshift hospital to isolate All people with mild symptoms. So they will not infect others
That's why China with 1,4 Billion population, can contain the spread of this Covid19 infection and also have lower death rate. Because in makeshift hospital, many medical staff will take care of them 24 hours