Why do you say that when you are still doing them/teaching them without SW? You have seen a Shotokan kata? Just compare it with yourself? Do you do them differently today?
I certainly hope so. If I haven't learned anything in the last 50 years, I've sure wasted a lot of my time. And the time of my instructors. And that of my students.
But honestly, do you really think I can remember exactly how I moved for a ton of different techniques 50 years ago? Can you remember exactly (not just kinda sorta, but exactly) how you moved to kick or throw a ball 20 years ago? I tend to doubt it.