There are many tools that do this, but more often than not they still require significant hand tuning to look good. Best metaphor I can think of is publishing a translation of a novel. You can google translate it to get started, but you probably still need to reread the whole thing. In many cases, it's probably faster to start from scratch.

It can be automated but a deep import pipeline would really hurt iteration times. There's also a lot of tuning that goes into what is and is not the important part of a model and whether the simplification removes detail you expect to see.