Covid-19 reproduction strategy is to use kids as carriers by making sure that kids (and other people with a strong immune system) are not getting too sick when they are infected.

That suggests that Covid-19 is, actually, not as deadly as initial reports suggest. Most likely the number of infected people is heavily underreported.

If number of infected people is underreported 10x, and number of people who died from Covid-19 is reported accurately, then Covid-19 mortality is overeported by 10x.

It is possible that Covid-19 mortality is comparable with mortality of a regular influenza.

(which of course could kill still many millions of people, assuming you mean that the mortality rate is comparable to flu once you're infected, but that the transmissibility is much higher)