It failed because the CCP didn’t spend the time gained by the strategy to vaccinate the whole population. They would have had plenty of time for that until Omicron hit.
In an unvaccinated workplace, a single infected person can easily infect everybody in a single day. In my country, by that time everybody already was either vaccinated or recovered (or dead), so it only hit half of the people (I was one of the ones who got it back then btw).
Murphy should probably stay clear of windows and high-risk endeavors for the rest of his life.