All this is showing us is who the folks with a passion for riding are, young and old.
It wasn't too long ago that owing a motorcycle was a "socially cool thing", almost like part of a clothing ensemble. Same with those cute tote puppies folks bring every where. But then the folks who bought all those bikes found out their "passion" wasn't enough when they got caught in a rain storm in Wyoming, or had to cross the desert at 110 degrees, the non-glamorous side of riding. So the market got glutted with low mileage bikes. Those of us who are left, are the die-hards, and will always be.
As for placing blame on the youth, I can't do that. Yes, they are interested in phones and gadgets, but they have so many wide interests. A focus may come later, and it may or may not include motorcycling. My eldest is finishing grad school and is focused on work as an environmental engineer. Right now he wants to travel the world and visit other countries. My youngest is in his second year of college. His interests are surfing, archery, chess, and studying stuff I can't even pronounce let alone understand. When I look at them and their peers I see the bright future of our nation.
As for motorcycles, there will always be the diehards. As for riders, I see a lot of new riders, as in folks in their 20's. And the majority are women and minorities. Like a lot of manufactures HD recognized that and started their pitch towards them. However these young ones cannot afford an HD, so they buy other brands until they can buy one. Just like a lot of us did.
The market will adjust. It may slow down, but motorcycling is not going to die out in the next 7 years.