It conflates "deaths caused by pandemic" with "deaths caused by reactions to pandemic" with "deaths caused by random things that accidentally happened during the pandemic".
Imagine a parallel universe, where COVID-19 is actually just a flu, but for some reason the oppresive governments execute anyone who says so. In the parallel universe, they also have excess mortality (because of the executions) during 2020. So you cannot use the mere fact of excessive mortality to prove that we do not in fact live in this parallel universe.