2017-2018 was the worst year for flu season. Recently. Away from COVID. The vaccine didn't work. It didn't factor in the correct strain. Aussie flu broke in the west. Flu deaths peaked. The vaccine offered no protection.

Stupidly you must be aware that if you caught flu, you won't catch the same strain again twice. There are only approximately around 221 strains. You can catch a cold, sure. But not the same strain of flu twice. What does the vaccine even do, when your natural antibodies are much stronger. You can still transmit flu being a carrier despite vaccination. Vaccination is also only a guess, at which strains are in your area. It doses for a handful of the common strains likely to surface based on data offering a guess for the year in your region, and which cultures they have created into the yearly vaccine. It isn't accurate.

It wasn't in 2017-2018 with Aussie flu. The vaccine offered at the start of flu season, stopped almost nothing.

Of course if you are high risk, flu hits you like a tonne of bricks, instead of getting it every other year and it is nothing more than some sick leave, perhaps working where you travel more, and are around lots of people, do what you want and need too.