In games like Destiny or CS:GO for example, you should not even be allowed to start the activity without a working microphone. I dont care if you are antisocial, if that’s the case, those activaties aren’t for you and you shouldn’t bring down your entire team because of that.
As an clarification, I’m more worried about Raids than PVP
Destiny raids aren’t competitive PvP - it’s cooperative puzzle solving. The puzzles are designed to require communication and cooperation between a team of 6 people. Usually this works by having one player get the information that another player needs in some form.
It also helps if everyone is using meta loadouts or whatever, but that’s not the reason why voice chat is necessary.