Assume you asked me if you should buy "car A" or "car B", which were similar to what you used in driver's ed, and which the only dealership you asked assured you were both very good and very popular.
If I had had a bunch of problems with those sorts of cars, but knew of a "car C" that had better gas mileage, better performance, was so reliable you'd never need a mechanic, had all the available options you could want, and cost about the same as the other two choices, wouldn't you want me to mention it?
That's sort of how I feel about diving with a BP/Wing. I've owned my share of other BCDs, but I'm convinced it's a much better value and a much more versatile and enjoyable option than any comparably priced jacket or back-inflate system. If you ask about something similar to things I've had less than satisfactory experiences with, my natural inclination is to share my best solution.
Some divers say they don't want one, but that may only be because they haven't yet realized that they really do.
I wasn't interested in one either, until I eventually realized it was exactly what I'd wanted all along.
Oh yeah, and I never met, interacted with, or recieved any checks from JJ, despite what the great anonymous IndigoBlue might have you believe.