Well natural immunity in the situation I’m guessing you are talking about is because they weren’t vaxxed in the first place.But if you aren’t at risk of needing to go to hospital in the first place, why do you need to have it? What if you have natural immunity from having the virus too, meaning that you are just as unlikely to catch it as a fully vaccinated person?
You also seem to be making a different argument here. You were initially talking about obese people. But now you are talking about natural immunity.
You do also realise surely that it doesn’t hit only obese people? Plenty of young, healthy unvaccinated people have had serious issues with covid.
And you have completely blanked the issue of health care workers having to deal with this.