I agree that flawless shouldn't be a Moment of Triumph but your reasoning is a little off base. Raids could be included in that very same explanation. (ie. " but [u]completing a Raid[/u] is an achievement in and of itself. It has it's own rewards, emblem, shaders, and grimoire. There's no reason why it should be included in the MoT, except to satisfy elitist PvE players.)