This guy is not totally wrong but he is also way off about pretty much everything even just simple basic facts. He writes "Michigan Stadium, the third‑largest sports venue on earth." which is not even remotely true. Michican Stadium isn't even in the top 5 of venues in the US never mind globally[0]. And thats if you just take capacity counts at face value and don't try to include places that have huge standing room capacity like horse racing tracks.
[0] https://en.wikipedia.org/wiki/List_of_sports_venues_by_capac...