Well, Elon and SpaceX has the luxury of having a total control of the product's technical requirement.

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.