The SwimMastery Blog
By leading them through this principle-based practice, you are giving them an example of how to practice on their own. You know the principles involved, and over time, you have the opportunity to impart an understanding of those practice principles to your student so that they become a better self-guiding practitioner.
Any kind of cue for motor control we might use is, by nature, a metaphor, and metaphors are something that attempt to approximate a piece of movement reality, but are certainly not that entire reality itself. Therefore all cues have limitations on how they can help. They might also have liabilities.