Not really. Healbot misses so many things that can help your healing that grid and Vuhdo gives, as stated.
No matter what addon you have, if you cant stand out of defile or know how to play your class in general, even DBM isn't going to help you. But that has nothing to do with the discussion.
When you get into endgame you want to use every buff you have to you. Using healbot, which isn't bad, but doesn't give you anywhere near all the options you can get from grid or Vuhdo is foolish. And no, LKHM10 is not endgame unless you did it back before ridiculous %s.
I have never seen an endgame druid use healbot. My guild doesn't accept healers that use healbot. Seems dumb? Well, when you get into our level of raiding and people aren't using everything they can to min/max, they aren't what we want. It's like not using epic gems or the best enchants. It's not going to make you a better healer or make your character better. What it will do is give you everything you could possible ever use to take you above and beyond just being able to play your class.
That is why he said, if you are just raiding to raid HB is fine. If you are new to healing it's great because it's easy to set up. If you are looking for THE best addon to use Vuhdo is superior.