[SkeniaInhilla]

I don't think you need to have played on tour to be a commentator, you just need to know what you are talking about and be articulate. Same goes for any sport commentator really. Former players are great for stories/anecdotes but that isn't a must.

As for an instructor I agree that he or she needs to be able to play golf at a certain level. I would imagine it is hard to find one who isn't a very good golfer though. For PGA pros I believe they need to pass a PAT (Player Ability Test) and have a certain handicap (not sure how low?).