Academics is the one area in person conferences are actually useful...
Intelligent people are often antisocial but if you force enough of them into a small room to beg oligarchs for funding, they occasionally get to speak to other intelligent people from other fields.
We'd be better off just giving them vacations and letting them nerd out together for a couple weeks and get wildly different viewpoints for whatever they've been stuck on.
It's at least more beneficial than sales conferences