Why dont Millennials buy motorcycles?

I know a guy in Denver who had three Harleys he had accumulated over time. All three in immacualte condition. He rides one, his wife rides one and the other just sat and needed cleaning after he rode it about once a year so he decided to be a very nice grandfather and gave it to his grandson. The grandson sold it about three weeks after he got it and put the money down on a Tesla 3. Grandpa is NOT a happy biker!!! Before he gave it to hom they had gone on a few rides together and the kid told his grandpa how much fun he had. Then he gave him the bike and the first weekend they rode in the mounains together, the second weekend they rode in the foothills by Colo. Springs, the third weekend they rode to Estes Park, the fourth weekend it was gone,