Um did you actually read this? This is ESTIMATED over 9 YEARS (2020-2029). So their worst care scenario is 154,037 extra deaths/9 years (17,115 per year).
Here in real life COVID deaths are set to be 200,000 in the US sometime this week. It's September and this outbreak didn't actually start in full force until several months into 2020. We haven't even really seen what combo flu/COVID infections look like at this point since flu season was winding down when this became widespread. Biggest hope here is that flu vaccination rates go up and all the mask wearing/handwashing/distancing drops flu transmission rates significantly too.
This one really grinds my gears because there was this huge todo about "all of these people are going to die from suicide because of the lockdown OMG!". We haven't really seen that born out. We are seeing increasing overdoses (unclear why this is, theories range from more use due to social distancing/isolation vs more fentanyl in all drugs currently vs patients not using for a little bit due to the lockdown then going back to using at old doses which now but this honestly pales in comparison to the amount of people that are dying from COVID currently. They estimate these things based on change in unemployment rate (again, if you read the actual paper). So, based on that reasoning, more robust social services/government support for businesses during restrictions= less "deaths of despair".