What this topic always comes down to, is people who want parsers say they want a tool to use in game, people who don't use parsers don't want to be called out for doing shoddy DPS.
The age old 'People would be mean and kick me' argument is absolutely invalid as long as you're not seriously under performing. People don't usually kick a bad tank, only one that seriously stops the dungeon/raid from being completed. Same concept applies to a bad DPS. In other words, don't play an MMO then proceed to screw up things for 3-7 other people because you are too lazy to learn your own class. If you want to roleplay a bard that only spams heavyshot then fine good for you, but subjecting other players to that is downright unfair.