Oh trust me, people would notice DPS (especially if they parse) doing poorly, especially if it's their main. I pay close attention to BLM's for example and if I see a double hardcast of Fire III, I'm gonna say something.
Healers should DPS when there's no damage happening on the tank and group (like the literal no damage phase against Diabolos in Dun Scaith. It bothers me when I see healers doing nothing and moreso when they use healing spells when no one needs it).
