@OnTheWayOut: The data from Israel suggest that the vaccines do not reduce the odds. Being in the hospital was considered a 'severe case of COVID' pre-vaccines and that was what the vaccines were supposed to prevent if not prevent the infection altogether (like any other regular vaccine would). If 50% of the people in the hospital have had the vaccines in a population where 80% are vaccinated (and for all intents and purposes, group immunity should've been reached) the odds of reducing aren't all that good.
The people in wheelchairs from polio were the "non-severe" polio cases. Do you think people would've found the vaccine to be successful if you had only a 50/50 chance of it preventing a "severe" case but only if you stayed home from work forever and lived in a bubble for the rest of your life and the disease continued putting people in wheelchairs and keeps infecting and killing those that work outside the home?
No, people would've said the vaccines do nothing at all at preventing polio, and moved on. We knew about germ theory well before vaccines, nobody suggested we should live forever in a bubble in order to never get sick.