You're entitled to your opinion of course, but I disagree. Putting is a skill that can be taught and practiced and besides you get close enough with the approach usually you're a 2 putt away at most.
every golf skill can be taught, it doesn't mean you can put that into practice effectively and under pressure. Putting is the easiest skill to teach, anyone can putt, but factor in speed, grain, line and natural ability to read the greens and it's a whole different ball game.