The flu typically kills the extreme elderly or people with extremely compromised immune systems. Aka they might die at 94 vs 95. COVID on the other kills people who are relatively much healthier, someone that dies at 75 vs 95 lost 20 years not 1.
This is also why people 70+ are almost fully vaccinated in the US. For that age range it’s an extremely serious disease with a high chance of killing them after infection.