They have all those specialized teams, because in the industry customers have very high expectations and low tolerance for failure.

Stuff Made Here is a great channel and produces a lot of fun projects, but that only works in a context of prototypes where you need a wide range of skills (but not necessarily a deep one for each of them). E.g. the hair-cutting robot is fun to watch, but barely works (and needs human intervention) and is years away from being a viable end-user product.