Even if you're not a high risk, getting a flu shot is an important preventative measure for any high risk individuals you may come in contact with.
(There's a special version you get if you're in a risk group but most people over a certain age can get the standard one.)
One issue may be the availability of flu shots at this point. Also there is a small risk of getting sick from the shot, which would put you at increased risk if contracting Covid-19.
Sometimes if the vaccine supply is impacted by something they will try to give it to at risk people first. I don't think there is any such restriction right now.
some private health insurances also cover it.
I guess it’s somehow got to do with living in a country with some leftovers of the Socialist hellhole it used to be... /s