I completely agree. You hit the nail on the head in regard to the other BRP lines. It isn't just an age thing tho. Like you mentioned, some would appreciate the extra power for towing a trailer, others that put a lot of highway miles on would surely appreciate extra power in the top end for passing and getting past tractor trailers before they get blown off the road or ran over. In my mind, it is better to have too much HP / torque an not need it, than need it only to find you don't have it. Sometimes, having the power to get out of the way in a hurry is a safety feature like having good brembo brakes, ABS, stability control, etc. Anyone that feels they don't need more power doesn't have to twist the throttle as far, or they could offer different performance packages like you had suggested.
Even if younger generations couldn't afford it, they would wait until the used priced dropped enough that they could afford it, just like they do, he'll...we all probably did, with sports cars and muscle cars. Show me a 20 year old that wouldn't love to have a Hellcat, or a ZL1 Camero, a Z06 Corvette, or a Shelby or Rouch Mustang. They can't afford them, but you better believe they will be picking up used ones when they get into their price range. When they do finally get one they will tell everyone how they have wanted one for years and finally got it! That is what the motorcycle manufacturers are missing and don't seem to understand. You get customers based on the products you produce that everyone wants, even if they can't afford it. Instead of producing something that people think... I get one of those when I can't ride a 2 wheeler any more, or because my significant other thinks they are safer.
It needs to be something they want because cause they are a f_cking blast to ride. That would be the case with better performance and handling, even if it is only on one model.