I am a prime example.
Okay, I only have a few add-ons, primarily altoholic and healbot, as well as DBM. If they made me a good player, my achievements would be a lot higher. But having a healing add-on REALLY helps me keep my party alive. If the OP thinks add-ons aren’t needed, he better make sure all his healers don’t use one so he can prove how well he uses his self-heals.