vidcutter ultimately didn't help in this process. I built it from source and then tried the flatpak, but for all of its beauty, it hung or crashed when importing common but dated formats and containers, handling more than a few clips, and didn't allow precise jogging for splitting (when it didn't hang or crash). It's good for trimming up a smartphone video, but it's not on par with an NLE.
I ended up giving up and scripting out most of the project in ffmpeg and dvdauthor. If you know how to use core utilities, it's such an exercise in tedium struggling against underdeveloped front ends.
You could open the .VOB files directly, but that’s more cumbersome.
Why you'd want DVD menus in the first place, though...
I can't mount the file and also can't find any software that can make sense out of the raw CD sectors. Very strange.
That said, since I've been using an AI assisted terminal (warp.dev currently) my use of GUI wrappers for different tools has faded quite a bit. I like being able to "Clip 0:10 through 0:30 of file.mp4 and turn it into a web optimized gif", and this NLP workflow works as a "wrapper" for almost any CLI. It's a nice interface without the loss of any functionality.