> A game engine isn't likely to do that in a production build.
I actually have worked on two AAA game engines that did exactly that. The entire idea was to make importing stuff easier and minimize the time between the artists editing content in their content editor and having it imported and visible in the engine.
> Even if it wanted to though, these sorts of "file ticket" sandboxes still has support for "directory ticket" and "file watchers".
How are those given exactly? You'd need to ask for permission for every directory? If you cannot have the program monitor the directories, how would it know that a file changed before asking permission? Or the permissions will be asked at startup (since it is very common to edit existing content instead of only importing new content - the editor remembers the original paths for all content and can start monitoring it at startup).
TBH this all sounds like a UX nightmare, especially when the entire goal is to make the process smoother.