I assume you are american? Here on the other side of the pond (I'm in Denmark) the flu shot is only being recommended for weakened and old people and is not generally something that people get.I happen to be American, yes. But, I think we have the same policy here.
However, given my diagnosis, it is recommended for people like me. I handle my vulnerability to infection by working from home, avoiding large crowds and so forth. (I can't remember the last time I had the flu.)
Correction: We used to have the same policy here. From the CDC website:
CDC recommends annual influenza vaccination for everyone 6 months and older
https://www.cdc.gov/flu/professionals/vaccination/index.htm
When I was growing up, vaccination levels were talked about in terms of success. "We have successfully vaccinated 90 percent of people."
These days, they are talked about in terms of failure. "We have failed to vaccinate 10 percent of people." This is often followed up by classifying that last 10 percent as antivaxxers, nutters, holdouts, etc.
The reality is that there can be legitimate medical reasons why one chooses to not vaccinate. But this has become such a politicized topic that such people tend to get lumped in with "crazy antivaxxers."
Having spent time in the antivax community, I feel they largely exist because of that. If families with a known history of problems or simply personal concerns had their choices respected without so much public outcry and so many strangers butting into their (HIPAA protected) medical choices, I think you would probably see a lot less antivax propaganda. People who feel that vaccines are a problem for them and their kids would handle it a lot more quietly.
FWIW, I get demonized by both camps. You can't currently have a moderate position on this topic. Antivaxxers hate me and vilify me just as much as anti-antivaxxers.