I never said you, specifically, were bad. I was just saying that a reliance on tenacity is a bit weird, and shows the healers lack of skill or confidence. Healing is so ridiculously potent and damage is so low that tenacity should make barely a difference, if it makes any difference at all.
About wanting to deal high damage - just play a dps:
I want to be a healer, but I also want to push myself to do the most I possibly can. Since healing is such an easy job I fill in the space with damage. If I had to heal my ass off all the time I would maximize my healing just like I do with my dps.
I can do with with bad tanks and with good tanks, regardless of what their secondary stats look like. With a good tank l yes I will be able to DPS more, but I have never seen an actual tie between my dps and the amount of tenacity a tank has. CD rotations are the most important mitigation tools a tank has, so with a proper rotation any half decent tank (in half decent equipment) is a breeze to heal.