So? The OP observed that the most severe effects were in a very small population of hospitalized patients. You fixated on a (plausible) hypothesis made that this could be due to sedation, and used it to reject the entire argument, even though the OP’s point is right, and your argument is a lowbrow dismissal that “experts would have thought of it”.

By the way: as far as I can tell, the paper doesn’t discuss this issue anywhere.