Sounds like you just want to be the star in your parties by saving them when *%#* hits the fan. So considering that incoming damage is completely scripted and 90% avoidable, what do you do with all of that downtime you should be having?
Oh, right, because if you contributed to the group effort and helped bring the mobs down faster, you wouldn’t get to be the hero healer that uses LB3 when it could have been used to efficiently kill off the boss before they hit their enrage timer.
It’s not all about you.
If you want to be that healer who stands there with their thumb in their nose until there is something to heal, then go ahead and continue to do that and see how many groups want to play with you.
I prefer to utilize the entire kit given to me as a healer in order to help the group out by whatever means necessary. If I’m running with an efficient group, I will DPS until my heart’s content cuz, hey, a dead mob does no damage.
Stop pretending like you know the only way to play a healer. There is more than one way to play this game, to play it efficiently, and to enjoy it.