Ever since 2018 I have been getting a flu shot every year, too. Why? In 2018 I had the worst flu ever. It was BAD. Arguably worse than even the one time I got covid in 2022 (despite being twice vaccinated for that at the time). The horror of that flu made me never want to get the flu again.
I did... but it was never that bad.
That's why it was manageable and not debilitating.