Built-in Parsers

[Dualgunner]

This is a false equivalence. Mobs and bosses have HP bars and even percentages, you can observe how DPS are fulfilling their roles. What you can't observe is how each individual is fulfilling their respective role/s.

Therefore it's not a false equivalence, as you can directly observe how each individual is fulfilling their respective roles for healing and tanking.

EDIT: Especially when you consider the tanks and healers that do dps as well.