'TECHNIQUE OR TACTICS' ?

Out of 30 years of coaching the sport of tennis I would take one compliment over any other, ' You taught me how to play tennis'. ( From a 17 year old student ).
So why does that make me feel as though I achieved something ? Simple.
You can teach a student of any age how to hit a tennis ball however that student needs far more than just the ability to hit a tennis ball over the net. Once you are on a tennis court it is you versus another player, another mind, another view on how the sport should be played.
So who's view is superior and where did that view come from ? Is a player born with an ability to play tennis or does it have to be taught by someone who has played for a long time at a high level ?
Does a coach have to come from a strong playing background or is it possible to teach the game without even bothering the scoreboard as a former player ?
Personally I believe that a coach of tennis perhaps just requires a philosophy, a view on how to play the game.
I have seen some 'Mickey Mouse' tennis players who have gone on to become reasonable tennis coaches however I still think that you have had to have hit a ball in the 'heat of the moment' to be able to relay your thoughts to a player who is fresh into the sport of tennis.
I look at guys like Ivan Lendl who was a fierce competitor on court yet he was able to relay his ideas to a player like Andy Murray and those ideas stuck, they worked ridiculously well to the tune of two Wimbledon crowns, despite the fact that as a player Lendl fell short, the only major he did not win.
So how does a guy like Ivan Lendl use his mind to help someone like Murray who has owned a history of falling at the last hurdle ?
The thought process in tennis is not talked about nearly enough.
I have seen some players who I refer to as 'boutique tennis players', the type who look a million bucks in practice though play like a street busker desperate for a dollar when the game was on the line in a competition. So why is this ?
Many players are taught how to hit a ball yet not how to play tennis. The guy ranked 200 in the World is quite possibly a simple train of thought away from a regular spot in a 128 man field at a Grand Slam and a guaranteed $200,000 per year yet he will probably fall in the second or third round of qualifying instead.
Why ?
A guy like Ivan Lendl is required to help him get there but the Czech legend has a rather expensive price tag so that guy ranked 200 is relying on the brain of someone who has done a lot less than Ivan to help him get to a level of consistency that pays the bills on a regular basis.
Is it luck ?
Quite possibly. 
By 'luck' I refer to a player / coach relationship that works because many players cannot find the right person to guide them through. Luck has to play a part in tennis.
There have been numerous stories of players who have been World ranked juniors who have failed to even step inside the World top 100 when things really mattered. 
Is it because they were simply not good enough or not smart enough ? 
There is a difference.
You can be a 'boutique tennis player' or you can be a smart one.
You can keep practicing technique or you can learn how to play tennis.
Find the balance............