It also assumes, contrary to gathered data, that immunity lasts more than 3 months. There are now several studies that point to a short-lived immunity after fighting off this virus.
So far, the community of virologists and immunologists are warning that there will be a 2nd wave, possibly a 3rd and 4th wave as well, of this virus. The reasons are manifold and not at-all to do with governmental response.
No matter a government's response this is a novel virus, hey whaddoyaknow that's even what we're calling it, and it acts in manners that other viruses do not. Human bodies react to this virus differently than they do to other viruses.
To claim that governments are to blame is being disingenuous at best, and an outright lie at the worst.