Any good strength and conditioning coach that writes programs can always give you a logical reasoning behind the exercises, sets/rep ranges, tempos, and percentages prescribed. If you can't explain the reason why you're performing a certain movement, it probably doesn't belong in your training.
You should treat your warm-up drills the same way; there should be rhyme and reason behind everything you do. In this week's Move Better Monday, I break down how I approach my client's warm-ups and give an example of how it's done.
(Disclaimer: The video cuts out at the very end before I can finish my thought process, gets the job done though!)