These numbers are exceptionally high on aggregate. From the article: "out of every 1,000 people studied, there were around 4 more people in the COVID-19 group than in the control group who experienced stroke."
This means that for every million people who got COVID-19, we would expect 4,000 more strokes. Using a lower-bound estimate that 50% of the population will get COVID-19 at some point, this would mean roughly 650,000 more cases in the US alone (~330 million people), and this is in addition to baseline. A totally devastating pandemic.
Life insurers are already seeing it play out too, there was a 40% increase in life insurance claims for working age adults in the last couple years: https://thehill.com/changing-america/well-being/longevity/58... A significant amount of people are dying unexpectedly early.
...and that's a generously low lower bound, because at this point, the only thing that could prevent a percentage approaching 100% would be a (near) extinction event like an asteroid strike or an all-out nuclear war.
This means that for every million people who got COVID-19, we would expect 4,000 more strokes. Using a lower-bound estimate that 50% of the population will get COVID-19 at some point, this would mean roughly 650,000 more cases in the US alone (~330 million people), and this is in addition to baseline. A totally devastating pandemic.