Covid deaths are practically concentrated on age groups over 65 years old.

People dying from other causes aggregate multiple causes which, due to the aggregation, are spread out over the whole age range.

Due to the pyramid shape of the population distribution (they call it population pyramid for a reason) then the median and the mean are shifted towards the base/younger age groups.

Hell, if a disease affected mankind in a way that killed everyone uniformly, the average age of people dying would be around 30 years old.

The way you presented your conclusion implies that dying from covid actually extends your life, which is absurd.

Instead, it just reads that it kills older people disproportionately, and the older you are the more likely you are of dying from it.