The content also requires less team interaction. Back then you could ask whether or not you wanted to clear side rooms or get more mobs for optional xp or rewards. You could talk and give advice on how to better tank or position mobs or bosses, or just about how to deal with specific things in general.
All of this has been essentially been axed out of the game, and since everything has turned into individual binary checks everywhere, then there is no reason to interact anymore.
Add this to the fact that when people reached a new low in EW with how "boring" dungeons turned out to be, it made people want to get out of there even faster and didn't exactly push them to actually talk. Or how the content has been macdonaldized: people queue up after work like they'd order a fast food, and they don't even do it for the quality of the food either.