Fine, Bloodwhetting is too OP

[PyurBlue]

Nobody screams at RDM for ressing or BRD to cleansing

Because RDM res doesn't invalidate healers, nor does BRD cleansing.

are pointed to BW for having a overpowered healing

Very rightly since it means healers don't have to heal.

I don't think it's hard to see at all, but if you want a deeper explanation RDM res at least comes at a DPS and MP cost. They don't freely raise players just by doing their rotation, and since they deal more damage than healers their priority is to keep DPSing and let the healer raise anyway. Even if that wasn't the case, res isn't a constant action and it isn't the basis of the healer role. BRD cleanse is on a cooldown and can only be used on one person. More importantly, cleansing is far, far less common than healing which is what healers should be doing most often outside of damage. BRD provides a small supplementary effect that comes into play only in a handful of cases and still doesn't negate the presence of healers because BRD is overwhelmed as soon as more than one player has a status effect.

BW on the other hand full heals WAR with no opportunity cost and makes the bulk of healer abilities (heals) worthless since the WAR, which is intended to be the focus of dungeon healing, almost never needs external heals. BW is the equivalent of "auto res all party members in range when dualcast is granted" or "Apply Warden's Paean effect to all party members while songs are active", except it's worse than that because it doesn't automate a niche healer task, it automate's the purpose of the healing role.

Ignoring broken skills instead of fixing them is how you kill fun.