Very stupid investors?
EV sales are flat or shrinking in the US (but growing extremely quickly outside the US, partially thanks to the Hormuz situation). Tesla's sales are flat. He's doing anything possible to show that Tesla has a future.
So, he basically told his talented engineers to take the stabilizing parts of a SpaceX rocket, put them in the body of a car, and pretended that what was demoed is actually vaguely related to something people might be able to buy at some point.
There isn't a chance that a vehicle with those kinds of thrusters would ever be road legal. You're basically driving a pretty large bomb around. You crash that vehicle and you don't just kill yourself, you kill everybody within a pretty large blast radius.