This is intentional on Google’s part. It’s anticompetitive behavior, to make YouTube service’s app shitty on Google’s competitor’s ecosystem. But no government seems to care—-and what will you do, stop watching YouTube?
This would be true if the Android or Android TV would have been better. It is just profit maximization combined with crappy UX/UI. Google wants your personal data and will make UI changes to get it. (double record/send button in messages, UI elements very close to others so that they can be pressed accidentally, although there is plenty of space between other UI elements)
We were talking about Google here. (you know, former search engine, don't be evil)
YouTube did push a version of the Apple TV app that tried this, but it would cause the app to crash/black screen, no joke. They reverted it.