The only way to be fast is to train at that speed.
I'm not completely convinced of that. Slow training seems to work on one's ligaments and internal structure in ways that fast training does not. Perhaps one can become 'faster' through slow training. You are suggesting that if I train slowly I will lose speed. I want you to convince me this is true. I'm not sure your runner analogy is appropriate. I'm not saying you're wrong, I just want you to convince me.