Not necessarily. Holy Paladins can be split between the bread and butter build (51/x/20-x) or the raid utility build which you might be thinking (51/20-x/x) or some unknown unique build no-one has seen. The only difference is the duration and amount absorbed.
Originally Posted by Neanor
Sacred Shield is a great shock absorber for mitigating the amount of a minor heal over a period of 30-60 seconds. The HoT is just a bonus if you got a paladin healer in the mix.
Trying to fit in Sacred Shield whilst tanking is tricky with a 969 rotation. If your threat management wasn't good to start with and your screw the tempo with a SS in the mix, you might find that one lapse can mean having a stack of mobs on you and having them on top of you because everyone else is dead.
Otherwise, SS in one occasional rotation wouldn't hurt ya as much as you think.
Healing is the source of life. Without it, you're left with death.