The reason excess deaths are only 3x higher is because of our precautions. If we let it burn through the US, millions would die and the ratio would be more like 100x (30,000 vs 3 million). Obviously depends on some hard-to-model assumptions. Your conclusion might be right, but your argument is terribly misleading.
(Plus, letting it burn through the whole population comes with downside risks of more mutations.)
(Plus, letting it burn through the whole population comes with downside risks of more mutations.)