Exactly because of that unless there is a whole team of designers, level builders and artists alongside the core devs, there is more ways to spend time than getting a PhD level knowledge on AAA engines capable of producing Hollywood class 3D movies.
I have tried out Godot and many, many other game engines in the past. They aren't there yet. Even as a hobbyist, I find Unity much more easy to use, and even still I'm tempted to learn Unreal simply because it seems more powerful and well architected under the hood.
They are where Unity 3.0 used to be around 10 years ago.
However Unity now is capable of supporting such kind of productions, with the respective increase in learning complexity and development teams scalability,
