Hahah. I have been doing this for 10+ years. I own a monopod. I own a tripod. Neither would be useful in this situation.
You are telling me, it is more efficient to continually adjust my monopod in height multiple times from multiple positions in the crowd instead of hand holding it and taking advantage of the IBIS?
In your mind, when I am standing stage right...new speaker comes out. I have about 10-15 min to shoots. I should first, adjust the monopod to the correct height. Shoot. Ah, now I want a bit lower shot with more screen and more stage...lower the monopod some more. Now I want that shot where its framed between two of the audience members...let me adjust that one more time on the ole monopod. And probably some more angles on stage right. Lemme adjust the ole monopod more.
And then continue this monopod dance multiple times for stage center, and stage left? Cmon now.
As I said before, rolling shutter at 200mm...open gate...not the best. Why open gate? Because most deliverables nowadays needs to be in 16x9 and 9x16. Rolling shutter at 70mm...fine.