I remember this, Mitsubishi in an American Car Movie in the mid 80s, loved this as a kid and Chan is awesome. Him and Kiel together, what a combo. Rest in Peace, Richard Kiel!
I never even knew about this back in the day. I assumed (making an ass outta you and me) that you had to fight and kill all enemies. You can literally run past 99% of them and I have a couple of longplays demonstrating this.
I agree with that - not to mention if you deviated just a fraction from the predetermined path, you'll fail the training. I suspect quite a few people back then missed out on the actual game itself due to constantly failing training!