i dont think it has much to do with social anxiety because u arent socialising ur just relaying information, but i thought people were concerned they were comming too much or something like idk if its encouraged you just say whatever u are thinking because u can lead ur team into an unfavourable position
in a pug where u may be an open player in a team with an invite player, you may not want to speak at risk of saying something that doesnt make sense
counter calling cluttering comms and all that shit - all my teams apart from my last team suffered from that because we were all talking all the time