This drill will help to develop a straight hit with no wobble or face tilt. It's also a great chance to see how your other skills are working towards a solid putt.
The biggest reason people miss these shots is because they don't trust their line. Here's how a tee can help build confidence.
Distance control is the final and most important skill you can develop for putting. You can't control distance without having solid ball roll, face hits, and speed.
If you are not confident in the shot you are making, you will not commit and will not hit a good shot. The first step to pre shot routine is choosing the shot you are comfortable with.