I can only think of 2 reasons to buy NON fire retardant driving shoes.
Honestly, why would you need fire retardent anything at an autocross?
I have exactly two pairs of shoes. One pair, new and very heavy; too cumbersome for autocross. One pair old and crappy, time for the trash. I went to the mall, looking for some light sneakers with thin soles. I found some. They were marketed as "driving shoes". So there's your reason number three.
I think you're onto something with the Tokyo Drift merchandising, though. That sounds like a gold mine.
You're a nice, friendly guy in real life, Leonard. I don't know the reason for bringing attitude to the forums.