Except that your figures are (a) based on only confirmed cases, making them certainly an overestimate of the fatality rate, (b) the consensus on Covid-19's overall fatality rate* is somewhere less than 1% but more than 0.1%, so I haven't plucked a figure out at random, (c) it doesn't taken long to spot that 10% of people dying is far worse than 0.5% of people dying when the disease is so virulent so on that basis by 300,000 might even be optimistic in a no-lockdown scenario, and (d) the principal flaw in your thinking is some bizarre and utterly mistaken claim that people "could be forgiven for thinking" that I've ever portrayed Covid-19 as automatically fatal. I have not. It's completely false to imply otherwise, and I'll thank you to withdraw that allegation and admit your mistake in ever suggesting it.
*The fatality rate for Covid is showing huge variations by age, so it's difficult to give a precise figure, but since we are all agreed that there are more actual cases than there are confirmed cases, then 10% is certainly too high.