Some of that created silence and indifference is the fact it's that it's a MMO turned into a single player game. It makes the game feel kind of hallow and empty.
You can achieve everything in the game without interacting with others and most of the time, it's more beneficial/time conserving to do so.
There's a lack of social based duties where you need to communicate. No reason to engage in conversation in dungeons or discuss anything. Crystal Conflict has restricted chat. Followships are a wasted feature, Linkshells are a dying concept that really needs more member slots expanded. Free Companies have no value, so everyone just makes their own solo FC for a house. There is virtually no reason to engage with one another outside statics and even that, you disband afterwards and rarely talk again. It's kind of depressing how this game is meant to be a social game but the only way to really do so is to randomly /tell your local Limsa Afker and hope they dont ignore you for either being creepy or a character they dislike looking at. I don't necessarily fault the game 100% for this though, Discord is a huge reason why things are like this with their pingable bots and notifications.