Is your goal to just be as misleading as possible in this conversation?
Yes, of course more 55-74s have died – there are far, far more of them than there are >85s. Normalized, COVID is far more lethal (8x more lethal) for >85s than for your range. Here's the mortality rates:
Same as in any other area, assume malaria isn't killing babies and do the math. Your question sounds rhetorical but is too simple to answer, so I'm confused.
The actual numbers are more representative than lethality percentages when we're talking about contribution to society.