DB can you please post vid?
What you are saying seems to support not using any resistance in sprint training. Stating that increasing stride length and frequency is going to create acceleration is pretty obvious and I doubt is going to be disputed. What is being disputed and discussed is which method(s) are going to create the best transference (and perhaps, which are best in certain situations). Without a video to understand what your point is on relation to THIS, it’s difficult to really advance the discussion in any way.