Case you aren't aware, his professional career has involved the use of vents in patient care. He's very versed in treating patients who experience many of the complications that covid is showing to cause. He's also in a unique position where he interracts routinely with numerous other docs and health care providers from across the globe who are as capably informed and qualified to speak about this pandemic as anyone because they are on the front lines of treating it and researching and assessing it's impacts and causes. He might not come out broadcasting his credentials, but that doesn't make his opinion a novice one on par with yours or the vast majority of the rest of the board.
For being one of the board's biggest flame fanners with this entire topic, your posts on the whole have been as condescending to opposing views as anyone's have been. When a level of understanding of a topic is vastly superior to those you are speaking with, being right is not synonymous with being condescending. If you want to call him condescending, feel free to do so. You'd be better served listening because he's likely as informed and correct as anyone else on here about this particular topic.