Usually the engineers and project managers that work at Tesla take Musk's ideas and either make them work or convince him that there is so little chance of it working that it isn't even worth trying. That didn't happen for Cybertruck.
Of course it remains popular to snicker and jeer when Musk fails, which is fine if that is what gets you through the day. The side effect is it suppresses what the original project directives were.
I recall Musk talking about the Cybertruck early on, which was supposed to be a low cost offering for its class. In the range of $30,000. His idea was to create a truck with material that was sourced by SpaceX to build rockets (stainless steel), and build an exoskeleton with simple and cheap cut-and-fold operations and minimal welding and no paint. The guts and drivetrain of the truck would sit inside the exoskeleton. Going by the back-of-the-napkin design it sounded achievable. He also made it clear he knew that not everyone would like the dtesign but he wanted to put forth a radical new look. That part worked, at least.
"Sounding" achievable isn't the same as actually achievable and Musk should have done more homework up front. The engineers had to do one modification after another to the original idea in order to make things street legal and soon you ended up with what you now see in the parking lot. They should have chopped the project off after they knew that the original cost goals would be blown through but for whatever reason they didn't.
They should have had something like the Slate Truck. Instead they ended up building the Queen Mary.
