I don't know why people downvote things, but in this case I would hope it's because the previous comment was pretty superficial. Whether the covid causes cognitive decline through causing the use of a ventilator, sedatives, and immobilization or through some other mechanism still means it causes cognitive decline. So there's a basic logic flaw. Also, quite a large number of people have been put on ventilators due to covid-19, not "almost nobody". That's just an incorrect assertion. You'd like to attribute the downvoting to politics, but given the quality issues, I think that's a hard claim to support.