...because you're an adult who sees the bigger picture and don't have the lens of an 8 year old, but the focus of a man who's lived a few odd but hopefully even years?
Because it's a fucking Cybertruck lol... In nearly any other situation, I would say you're right. Take the kid's choice into consideration, but then maybe ask if they have a second favorite car.
His answer is no. I asked him why he loves it. He loves that it's different from anything on the road. Since he has a rare disorder, he feels that he is also different. He can relate to the car more. Can't argue with that.