You make a fair point, but as a trained salesman myself, the argument has holes in it.
Many years ago, running my own business in the UK, I drove past a Jaguar dealer, spotted a beautiful Jaguar XJS Celebration (one of the very last models) on the forecourt and had to stop (as you do).
I was dressed in ripped jeans, tee shirt and trainers, strolled in and was largely ignored as a tyre kicker. However, a well dressed salesman approached me and asked if I would like a test drive, after which it was a no brainer. He had clearly been to the same sales training course as me, where I was taught that looks can be deceptive.
I bought the Jag and later two more from the same bloke.
Harley, it seems, doesn't work that way, so it's their loss.