The problem with saying they should allow personal or private parsers is that they wouldn't stay private. Someone would figure out how to pull that data from the game. The data would be up on things like FFLogs. If your data *wasn't* there then you'd be excluded from parties. Yeah, people can do some of this now but they have to be careful with what they say in game. Having any sort of parser endorsement by SE will open that sort of discrimination to no longer be against the rules.