I think this is a good illustration of
@Terminalxylem's point above. Not trying to call you out personally here or place blame, but here you (and likewise many of us) acknowledge the risk in not getting it and potentially exposing your newborn to a virus that could do serious harm or even cause death and get the shot for that reason. Yet outside of that particular scenario with your own baby it's a yawn and a pass yet you may end up interacting with other newborns or elderly that could have serious repurcussions from the virus while carrying it in those years you don't get that shot.
Again I'm meaning to use "you" in a general sense here with this particular example as I just think it's something that many of us don't think about. Yeah I don't usually get the flu anyway so why inconvenience myself and have a sore arm for 2 days and if it works out such that I get the flu once every 10 years than I'll just have a crappy week and move on. But we don't really think about how that 1 in 10 years we get the flu we could hand it off to someone for whom the consequences are much worse than just a crappy weak. Even with the flu shot not necessarily helping every year if it means we get it 1 in 20 years instead of 1 in 10 that is still a big difference in how it affects the population when we multiply that by 300 and whatever million people we have in this country.
It's kind of like voting to me. Individually sure my one vote probably isn't going to matter just like my one flu shot probably isn't going to matter. But collectively those individual choices add up quickly.