Heck no. Paladins don't have self-sustains like Aura/Brutal Shell shield from GNB or Souleater from DRK. It's their only source of self-healing and it comes at a cost of DPS to use unlike the other tanks. Any PLD worth his salt won't use Clemency unless it's an emergency, like when a healer drops and DPS start eating unavoidable AoEs, or if the healer is pushing things too far (if I'm popping cooldowns and still ending up near death so the healer can spam Glare, I'm damned well going to start taking matters into my own hands to avoid a wipe). Its a trade-off to use and it's also a big part of the class identity. Even Paladins in D&D have healing skills. It doesn't diminish a healers role to have some support from a couple dps healing skills when things go south.