Par is important in tournament play so players can see where they stand in relationship with other players.
Nonetheless, I think the point is that a hole you make four by hitting the tee shot almost anywhere, put it on the green and two putt for par is fine. However, to see these guys have to shape a shot off the tee to get the best angle to the green, hit it to a particular quadrant of the green to give the best opportunity for par or birdie is fun is to watch. Think of the skill it takes to think your way around the course, plan your strategy and then pull off the shots needed on a course where precicion is mandatory, showcases their talent. The "rub of the green" has some real meaning at the Masters.