Secondary health issues are causing more deaths than the flu is. Heart Attacks, Sepisis, Pneumonia hit post Flu, and that does not account for those who are immune or other health issues compromised. Patients with heart, lung, Diabetes are higher risk. https://www.usatoday.com/story/news/nation-now/2018/02/10/why-people-outside-high-risk-groups-dying-flu/326789002/
And this year the CDC got the Vaccine wrong. 18K die annually not since the Swine Flu which hit 56K. H3N2 is only 30% effective, the total mix is 10% for the failed Flu Vaccine. No accurate account of the Tamiful deaths yet.
And all of those secondary health issues are a direct result of the infection with the influenza virus. I do not think most people realize just how much an influenza infection leaves one vulnerable to other issues.
The thing about the vaccine is that even if it does not protect against the exact influenza strain that is circulating, it still provides partial protection if the circulating strain is similar to the one in the vaccine. With partial protection, you can still get sick but not as sick.