Firstly I'm not infuriated by the childish remarks, but they diminish the poster's actual - often good - points. It also drives away many people who can't be doing with the bickering and so you can end up with entire threads of people just falling out with each other. In the end we all have a shared passion, and although we have differing views, there's just no need for all the nonsense.
As for covid, we'll have to disagree. I'm not basing anything on just my experience, despite us been unusually unlucky to have so much covid in our family. I've done lots of reading around the subject, for obvious reasons. Also, as I said, I worked clinically for many years so I'd hope to have a reasonable understanding of anatomy and physiology.
The effects of covid on the players are not black and white
They may have felt perfectly well, but actually there may be a slight decrease in some of the things that make them good footballers, that they aren't even aware of. So a slight reduction in stamina, sats down by a %age or 2 during a game, slightly less accurate passing (I've become mega clumsy since being ill), a small loss of pace. All of those could happen without a player actually being aware in advance. So I'm afraid I disagree with your 'logic says' argument. Your logic might think something, another person's might think something else