I'd argue it has more to due with comorbidity and less to do with age unless the aged have health issues.
There is a list of comorbidities. Meaning, which are most often present in the Covid dead.
1) Dementia
2) Hypertension
3) COPD
. . .
6) Obesity
75% of people over 65 have hypertension and those odds grow each year.
The point being, there’s no real reason to talk about comorbidities seperately and in addition to age when nearly all the old folks have one or more.
I had it and finally tested positive a few weeks ago.
It sucked and missed 3 partial days of work (made remote meetings and other necessary stuff) and wouldn’t try to get it again but have certainly been a whole lot sicker many times.
And I have not contaminated my blood with their poisons either.