I dont think it has something to do with FFXIV, but moreso that some people get corrupted by power and think they're more important than the actually are. Pretty sure that guy imagined that the rest of the comm would stand by him as his tool is oh so important.
But that's something i see everywhere in life: work colleagues who think they're too important to ever get fired. HOA presidents who think they're second in line after the actual president. Or to take the classical MMO example: the tyrannical guild lead.
Don't think it has anything particular to do with FFXIV