Then you're doing it wrong unfortunately.
Mindlessly mashing holy until you're oom isn't any better than standing there doing nothing but a regen every 20 seconds. If the group's DPS is low and stuff is taking a while to die then you're likely better off doing your damage via Aero III into Aero II multi dotting with a couple of holys mixed in more for the stun than anything else. It's perfectly possible to do very respectable aoe DPS as a WHM but frankly, even as a die hard WHM/AST main, I do all my roulettes as SCH for the efficient nigh endless aoe potential, it's just the better job for this task.
And I'm glad that being a career healer means I'll likely never have to sit there and stomach your entitled attitude. I'll never push a fellow healer into DPSing if they are still uncomfortable with the encounter, but I have no time for those that are absolutely unwilling to roll their sleeves up and put in some effort irregardless of the situation at hand.
And personally I absolutely love these changes, I'm a very cautious healer in progression content and this will let me safely contribute much more consistent dot damage whilst still keeping my cautious play style intact.