It reduces the chances of all three, and _dramatically_ reduces the chances of the last two. That's what vaccines do. Now, it's not a _great_ vaccine. There are a couple of magic bullet near-100% effective vaccines (for instance, only 3% of people with the MMR vaccine exposed to Measles will get Measles, and the smallpox vaccine is 95% effective), and there are some... less effective ones (assuming the right strain is targeted the flu vaccine is 40-60% effective at preventing infection, and reduces chances of death somewhat).
Hopefully better vaccines will become available, but for now we are where we are.
I mean, if you want to say "only things with >90% efficacy at preventing infection are vaccines"... okay, but what do you want to call all the vaccines that that excludes?
> These "vaccines" limited effects at reducing symptoms (the only remaining claim of late), do not even persist more than a week or two before beginning to wane to nothing
Eh? Where are you getting that? It does look like efficacy vs _infection_ diminishes rapidly (at least for two doses; insufficient evidence to say anything with great certainty about three doses so far), but a two-dose course from last year remains quite effective at preventing severe outcomes (though less effective than three doses).
> These are at best therapeutic drugs, not vaccines.
They're not therapeutic drugs at all; if you give the vaccine to someone who _currently has covid_ it won't help them (at least for that particular case of covid).
> That is, they are - broadly - failures.
In Ireland, we have about 95% adult vaccination. Most of our current ICU cases are unvaccinated under-65s; there are almost no vaccinated under-65s, and a small number of vaccinated over-65s (essentially all over-65s are vaccinated). I would not call this a _failure_, at all. If the ICU rate was the same in the general population as in the unvaccinated population, ICU capacity would be exhausted and people would die needlessly. Preventing that is a success.