Depends entirely on the cost vs. the benefit. As I said, a 90% relative reduction is meaningless without knowledge of the baseline risk.
And once you know the baseline risk, you can do the math instead of just reacting emotionally.
No emotion involved, at least not from me. Seems clear enough to me. You seem to be the one having an emotional response here.
How tiny? It matters. Your risk of a bad outcome from Covid-19 is extremely tiny.
(Also, by the way: the costs are greater than what you pay for the shot. Miss a day of work? Spend a day in bed? That's a cost.)
> it benefits everybody you probably won't infect if you get exposed to the virus.
We have no evidence of this, nor do we have any reason to believe elevated antibody levels will continue indefinitely. Antibodies from the third shot will wane, just as the antibodies from the second shot waned, and antibodies always wane after antigen exposure. It's how our immune systems work.