Then do your job and weave in DPS during the 10-12 seconds you get to wait between heals rather than running around and spamming emotes/looting/bouncing/doing other things that do not help the group.
Healers job is to support the group. Throwing up a HoT/shield and then doing damage supports the group. Overhealing by spamming 90% hp tanks and running around like a weeaboo do not.