The thing is: there's a tension between "knowing stuff" and "being a good friend"
It usually means coming in and caring for folks you have never met who are doing things in a way that hurts. The trick is to explain this to them in a way that's non-confrontational and that they can grow from.
I used to tell people being a consultant was traveling to far away places to meet new people and disagree with them (grin)
Knowing stuff and being able to do something useful with it (AND sell it) looks pretty smart to me. :)