It's because healer dps skills have basically been reduced to one dot and one button, you know it's good game design when the rotation leaves you super bored but you have to remind yourself to pay attention or people will die, kind of like a middle schooler in math class the day before a test.
Though I will concede that WHM was one dot one button before SBr I think, but I don't know about AST since I've never played it, scholar though, well, rip my former main class.
