There’s literally no reason the graphics wizards at id couldn’t make a Bethesda branch of the engine that uses similar or identical workflows to Creation but also employs all the best practices for a modern open world engine.

It's hard to take your opinion seriously with this kind of statement. It has some real "It's 2023, where is my flying car?" energy.

At the end of the day, it's a lot easier to write a wishlist of game engine features than it is to actually develop said engine.