It's not a strange thing to say, why would I and others take something we won't need,, I have had the flu before, nothing I can't handle. Average age for deaths is 81,,all with 2.35 other life threatening illness, you would think no one ever died before covid came along.
as with most vaccines the idea is to achieve a level of immunity within a population such that the virus is eradicated.
it's not a simple question of 'do i need it' - most will not 'need' it per se
it's more a question of 'am i civic-minded enough to take it'? : are the risks small enough, the inconvenience low enough that i will carry those costs for the protection of those closest to me, and for the wider good.
it's big game of prisoners dilemma where if you are one of a tiny number of abstainers you can freeload off other's immunity without the inconvenience/risk, such that they exist. you cannot catch the virus as others around you have taken the vaccine
but if there are too many abstainers you do not get to freeload and the abstainers impose costs onto society as a whole through overloaded hospitals, lockdowns, etc etc. and you also carry risk as you most certainly can catch a potentially debilitating virus, or pass it onto a loved one.
we recently saw the reemergence of measles due to enough parents being swayed by bad science to lower the immunity such that the disease could make a comeback
my guess is that the negative externalities imposed by people not taking the vaccine will not be simply absorbed by others. there will be costs imposed on abstainers through companies not wanting to have their custom, insurers reflecting the extra risk in their calculations etc
we may also see incentives going the other way.