Parsers, like many artificial 'aids' to play in games change the nature of the game. IMHO, over use and over dependence on parser data makes people pay overly much attention to their damage numbers at the expense of everything else - and in particular working as a team and performing their role excellently.

Tanks should be more attentive to aggro management, damage mitigation, picking up adds, making sure the healer doesn't get left in the crap, that kind of thing; but NOT paying more attention to maximizing their damage output for their parse. Healers should be paying attention to tank health, watching aggro, checking statuses, keeping half an eye on the damage dealers we all know forget to evade AoE attacks and making sure they are safe themself; long before even thinking about looking at their damage numbers for their parse. Damage dealers should be paying attention to target priority, position, evading AoE attacks, watching the amount of aggro they build, keeping an eye on the healer so they don't get stuck on a limb, when possible maintaining their rotations, and of course managing their DPS checks carefully; long before they start focusing on their DPS numbers for a parse.

The point is that a dead tank is no use even if their parsed DPS output was record breaking. A healer that can out DPS BRD or MCH consistently is utterly pointless if tanks or damage dealers are dying during the fight. Damage dealers with record parsed DPS re only useful if they can maintain that high output without requiring everyone else in the party to compromise their roles to support the all out DPS play focused solely on maintaining peak DPS regardless of incoming AoE or damage.

I'd have thought that people would have woken up to the fact that when everyone plays their role to the max, the team as a whole functions better than it does when everyone is trying to out DPS each other; because DPS is king and some pillock with a parser might criticize their play because their DPS is somehow to low. As if the arbitrary standard, set by said pillock, is somehow an objective measure of a player's ability, rather than a measure of said pillocks' tunnel vision.