Practicing the form is about repetition, getting the muscles to do what you want, stretching the tendons, maintaining a focus on the centerline for efficiency, keeping proper balance in the stance, learning to deal with many things at once, and learning a feedback loop.
Exercises for punches and blocks focus on blocks first. These start off working to get the brain and eyes and hands to coordinate better. They turn into a mechanism for feeling. Using your antenna of touch over one of an antennae of sight. Feeling, sensitivity, and balance become an important factor.