Not "needing" also does not equate with being an emotional island.
Of course people will still need-- or be convinced that they do if they don't ask the question, "Do I NEED?"-- but most of what we think we need is really something we want. And, yes, there is a difference between the two-- in the effect ON US. From the outside they look the same.
Actually "wanting" is less problematic. "Need" is driven and has hooks in it. Also need leads to entitlement. When you "need," panic and resentment set in when you don't get whatever it is. When you want, then both of you are free to choose with no psyche-threatening consequences.
I just finished listening to the entire Byron Katie audiobook, "I Need Your Love, Is This True?" It's dynamite stuff. Could put this whole board out of business.