I should've made it clear when I say "events" I mean more webinar style events. 100+ participant meetings where everyone is an equal participant isn't useful, but that sort of thing isn't uncommon if you're holding all hands calls or annual shareholder meetings etc.
Well, no – not if you still need audience participation with video and/or audio. Things like annual/quarterly meetings and such where people have a right to speak etc. It's really not that different from a typical video conference, just that the moderator has controls to mute/unmute people and participants can't unmute themselves. Polling/voting/chat features I reckon are secondary I reckon.