Broaden your view. You are not put on earth to write great code, but to solve real world problems. Software development is a means to an end, not the end itself.
Most probably this is because Elon, being the CEO, has enough technical prowess to oversee both the real-world requirement and technical aspect of the product. This allows the company to streamline the practical/from-real-world requirement and the technical specification, therefore eliminating "things that shouldn't have been built in the first place".
This is luxurious because other tech company either does not have and/or does not realize it must procure.
One of my personal daydream is to be in a period where this streamlined real-world requirement and technical specification is common, not a luxury.
My wish is not only for my organization but for everybody. The world might be a better place if things are cheaper to maintain.
Including the folks at Valve.