I'm not so sure that is an accurate statement. I'd say it is more of a disease for the unhealthy at any age than for just a certain age demographic. People of all ages with underlying health conditions seem to be the most at risk. Sure more old people appear to be affected but only because they have more of the risk factors due to their age which is natural.
Incorrect. All diseases create additional stresses on the body that cause higher mortality among the vulnerable. Covid-19 creates fewer stresses than the normal seasonal flu, as the seasonal flu has a larger proportion of fatalities among the young than Covid-19 does. This is an indisputable fact. If Covid-19 put more stress on the more vulnerable, you'd see more infant mortality than the flu. Covid-19 is resulting in more deaths because the population does not have any base of immunity (to lower both the spread and the severity). But all diseases are dangerous to the weak; we should be thankful that Covid-19 is so mild...