You obviously didn't the article, did you? He's ok but still recovering.
Not the first time you've misjudged him; I remember your presumption that he was a Brexiter and your surprise when you found out that he wasn't! Silly to think that just because he is a PFM (although he probably isn't!).
Also, I wonder what his motive here: https://www.ucfb.ac.uk/news/ucfb-news-hub/nigel-pearson-on-the-importance-of-mental-health-support/
Yeah, he might have called a journalist an ostrich (possibly justified!) and grabbed a player by the neck and shirt, but I don't think there was necessarily any malice in it.
No malice in gripping a player and choking him? It was extremely weird, if not malice then what was it?
It was nothing more than 'acting tough' behaviour, nothing violent and malicious. Even McArthur was smiling with him by the end of it. I believe the FA didn't see a justification to take any action against him apart from warning him of his future responsibilities.