Never quite understood why a pro golfer needs someone else to show them how to swing a golf club. You'd think that they would have it figured out after playing most of their lives.
I'm just sayin'..
just like in any other sport coaches are needed when bad habits arise and need to be fixed. No matter how experienced you are at something having another pair of eyes viewing your movement is the best way to get back on track.
I come from a professional background in sport (polevault) which is also very technical like golf so i can understand why Tiger/ all pro golfers get coaching as this provides solutions to errors in technique and gives confidence to the athlete when the error has been solved.
Bad habits usually arise in technique when you are low in confidence, been out of competition for a while, lack of training and lack of coaching. I understand Tiger has a great technique, but it would not have always been great, it would have taken many years of coaching to get there.
I hope Tiger finds the right coach because chopping and changing coaches can be very detrimental to getting back on track.