The exact quote is "I will add that I am personally not inclined to ever add a player skill/weapon/anything that can reliably and repeatably heal another player. "
Which isn't even close to saying they would never add a healing weapon. Only one that could do so reliably and repeatedly.
@Klipik Where he said he never going to add pets? Link please.
Nick said: "the game never need a healer class" or "healing weapons": http://forums.spiralknights.com/es/node/341#comment-1989
Also i remember he posted somewhere the only way to heal players were pills and hearts but i cant find that post. but well thats what he said.