I don't know who you're playing with but there's something weird about them. I see LBs of all types on Primal. As for healer LBs, you are unlikely to even notice it happens as all it does it increase your health & remove a debuff (if there is one). No different from any other big heal. Plus they only work if you're close enough to the healer and in Seal Rock it's usual for a team to be scattered like Showgirls pearls.