very good alan,
is there another angle to see this from?
or is life a polyhedron?
when you have been doing something for awhile you can amass a wealth of experience and knowledge on the matter
also you meet or become involved with a lot of people along the way, and like it or not you can be regarded as an "expert" in the field you are in be it hobby, business or just life
unfortunately some people think that what you say is a fact and believe it blindly
a good example of this is "but the pet shop told me that" many believe that if you work in a pet shop you must be knowledgeable and know what you are talking about
i feel we have an obligation to tell the truth or at least let people know it is only our opinion or experience
insert disclaimer about this post being just my opinion based on my experience