I don't think the argument is to not care about the older group. But it is possible more than just deaths are skewed to them. Is also possible age is just a proxy to what the real risk factor is. (My money is still on exposure to lung weakening environments.)

That said, I think the natural next step for this argument is targeted testing at younger populations to see what their IFR is. With stronger (read: expensive) measures to isolate long term care facilities. Occupants, care givers, cooks, cleaners, all. (If the immunity antibody story plays out, work on ways to get antibody positive people in those positions.)

And I will again point out. I'm a random internet poster. No, nobody should do something just because I think it makes sense. :)