Thats a good point, you really want to practice the shots that have the most.
If you shoot even par, your looking at
22 approach shots, assuming lay up on par 5's
If you hit the average 12 greens, then your looking at 6 short game shots.
Thats 42 shots
For par, your looking at 30 putts..
Short Game: 8%
But really you can put driving and approach in the same category because there full swings. thats 51%
If you look at what this thread is asking for 65% on full swing, thats only 14% more than 51%, which if you include the fact that so much more can go wrong with a full swing shot than a short game shot. Like yesterday, i'm laying up to a par 5, i push the shot right and it hits a tree, i was lucky it bounced to a place i had a shot at the green. If not i just wasted 1 shot, isntead i was able to have a birdie putt. If i miss hit a chip, i would have a chip or a putt, it would be a easier chip probably, or a longer putt than i would want, but its not like i would end up in some high rough or behind a tree that could cost me another shot and force real pressure to get the ball on the green to just have a chance at par.
You might say, that putting might be the most important, its just its really hard to make putts outside of 10' consistantly. The hole 4.25" in diameter. If you look up the thread, Putting Capture Speed, you will see that the relative hole size diminishes as the speed of the putt increases. Of course slope of the green effects that, i have had putts that curl around the top and fall in from the backside before. But the harder you hit the putter relative size of the hole decreases. Unless your able to have your putts die in the front edge with perfect speed, your never really putting to a 4.25" golf hole. So really, putting is very very difficult to master, and keep consistant round per round. Thats why hitting greens is so important, your more likely to two putt than any other putt. So if you hit a green your probably going to end up with par, and at least have a chance for birdie at a much higher percentage than with your short game.
I would say, if you want to practice your short game, practice to the point so your not wasting shots, like duffing a chip or skulling chips, getting out of bunkers on the first try, ect.. From there you at least your not waisting shots in your short game. From there just work on your full swing game. As for putting, get to the point you can two putt consistantly, that means you have mostly easy tap in's for 2nd putts, you will start making more putts because your speed is right. From there you can really hone in the feel of reading putts. If your blasting the ball past 5-7 feet, you will never learn how to read a putt because you wont get the right residual memory of how that putt broke related to how the green looked.