I mean, my own experience in the game is very similar to WoW. In general if you approach people nicely and talk to them ahead of time, they tend to match your energy in both games. Usually random pugs or people questing don't even talk to you besides a quick hello or gg.
I think the biggest difference is that damage meters are banned, so a lot of people don't risk using them, or at least don't show they are upset when someone is being an absolute shitter. I've had players get mad at the first wipe and leave in both WoW and FF14. Honestly it's the heavy handedness of the GMs and peoples willingness to report the smallest event that makes FF14 seem like a better community. It's also what leads to the huge passive-aggressive bullshit other people have pointed out. If you aren't allowed to be an asshole to someone's face, you will find ways within the rules to fuck with them. (heck, this happens on this very forum, and has for over a decade.)
I mean seriously. Is it that hard to believe that more people just block/report and walk away because they know if they respond too aggressively that they might be the one sent to the gulag? I don't know if that makes it a "better community", but it is effective and preventing people from being mean or trolling in chat.