Sure, but treatments of something that complex has to start somewhere. It seems to go in the right direction and upcoming treatments may build on that. I am not sure that anyone could have expected after many failures to just find the magical cure that completely cures Alzheimers.
The results regarding amyloid plaques just keep going back and forth over time, I'm very curious how this will ultimately play out. I suppose even if the plaques are a symptom rather than the underlying cause it can still be helpful clearing them away.