Just a little thought experiment:
If the current wisdom is actually that almost everyone will be infected eventually, wouldn't it (ignoring any ethical issues) be wiser to deliberately infect medical personnel as soon as possible, so the 5-10% of infected that need IC treatment can actually get it, before the medical system is overrun by the infected general population. In a few weeks, all doctors are immune (or deceased) so that they are much better prepared when the number of cases in the general public explodes
Probably little evidence for Covid-19, but for SARS, studies in animals have found limited immunity after both infections and vaccination attempts. https://www.medscape.com/viewarticle/706717_1