If you're claiming that, for instance, those aged under 40 without any comorbidities were at significantly higher risk of dying due to the impact of Covid-19 I think it would be good to post a reference for that.
The CDC publishes data showing causes of death by age cohort[0], it's worth looking at for the year 2020. Apparently they're still working on the 2021 figures.
The short version: Covid-19 just isn't a random killer - and certainly not of otherwise healthy under 40s - that everyone thinks it is/thought it was.
These numbers show that the number of deaths observed is beyond the sum of reported covid deaths + expected deaths from all other sources. Which indicates either that many covid deaths were misclassified as something else, or that the strain on the health system caused by covid resulted in significantly more deaths. If deaths were misclassified, it is certainly possible that some percentage of people in their 40s or 50s died of Covid, with cause of death listed as something else.
