@kwest,
I am pretty much of the same mind you are, but with the exception that I don't think "most people have already had it," and therein lies the huge problem. I haven't heard a single person in public health or epidemiology state anything except that the measures being taken are directed at slowing the rate of infection in the population at large so as to prevent the health care system from being overwhelmed by those poor souls who fall into the unfortunate category that will "go serious to critical."
I was discussing this with a client today who also happens to have been a nurse, and is following the science surrounding this novel coronavirus very closely. Epidemiologists estimate that until at least 60% of the population has been infected and recovered (regardless of how long that might take) there will not be enough herd immunity to prevent recurrence and hotspots.
I just got word earlier today that two friends of my family who are in their 70s have both tested positive for COVID-19. I am hoping they fall into the categories that fall somewhere between "mild to no symptoms," and, "nasty flu-like symptoms," but that they don't go into respiratory failure. I also refuse to assume that the worst is the most likely, because based on all available data it's not, and that's even within the most "at risk of going critical" demographic.
But, unless a vaccine is created for this very quickly, and herd immunity boosted via that method, most of us are guaranteed to get this virus.