Not a given. Teslas patent portfolio has been wide-open for manufacturers to learn from the R&D that Tesla did but they still insist on banging their heads against a brick wall to blaze their own path for whatever stubborn reason.
Keep in mind that what he's discussing in this video comprises 3-5 different divisions/departments of traditional manufacturers. Most have different heads and employees and all of them fight for their team. This is one of the things freely admitted to in early super manifold/bottle examination videos by the likes of Sandy Munro, et al. It basically did the task of 3 or so different systems in a traditional car. You still see these separate systems in legacy manufacturers new EV cars as a direct result of that sort of established politics that goes on in the legacy manufacturers.
It's a real mess and is why when you see an EV from a legacy manufacturer it tends to use a frame from an existing vehicle and has horrid volumetric usage to include next-to-no storage in frunk in most cases. Manufacturers just see that as an available engine bay to fill with inefficient components rather than making their systems more efficient, simplifying them or both.