I used to watch the Nascar Racers cartoon as a kid. If you haven't, the premise is basically Nascar-like cars but with rocket boosters going around crazy tracks with loopings etc. I unironically believe Elon Musk was motivated by this cartoon. The booster placement looks identical. If we can get something like this in real life, I'd watch it for sure.
I'm sure it will happen real soon. Right after the Mars colony and fully autonomous driving.
People said the exact same thing about relanding a rocket booster or a daily driver capable EV or about a satellite network large enough to provide low latency high speed internet everywhere on earth. Dude doesn't attract near-infinite investor money because of his looks or his way of talking, but because he actually got things to happen that normal people couldn't even imagine.