I could make a guess as to why that is. The people running the game actually do take reports of in-game harassment seriously. A lot of the community credits that at least partly with how everyone treats each other. If being abusive is going to put you at actual risk of a suspension or ban then the people more likely to act that way either learn to stay quiet or are filtered out of the community over time. On top of that, the game offers bonuses for helping new players with their first instance runs so rarely do you see someone upset someone is new(plus the roulette system in general encourages running content more then once which helps new players as well). There are some other design-level decisions that were made that all add up to the same thing. A community that is not perfect, but is great by a large degree. Enjoy your journey through Eorzea!