I think this draws back to the design they went for. The reason even Shield Healers have regens is because of dungeons. They have to be able to operate in a minimum capacity when it comes to small and large pulls, since I assume they also check on some optimizations for jobs in the Dungeons.

The AST rant aside all this is just showing how bad WHM’s design is - it’s stuck in the past like people say. It needs a complete rework and proper buffs to work.