I think it is well shown that there is harm, so I don't think there's too much point in waiting and causing more harm while we're doing studies—the studies won't happen overnight. If there's no convincing reason, say, COVID-19-wise, to continue with hybrid meetings, then I see no reason to continue to expose people to harm.
Having said that, they are still exposed to harm from interpreting just as they are now. It's just that virtual meetings and the technology to do that very well had to catch up very quickly over the last two years. They will still be exposed to such harm, to a lesser degree, even with in-person meetings, and that's shown by evidence going way back, long before COVID-19 was a problem, but you can try to minimize that exposure as much as possible.