Is real time used over IGT for these runs only because of the practicality of moderating & manually adding up all the IL IGT times?

I wonder if developing/using an autosplitter in LiveSplit could help with that. If I make it to the point of attempting the full campaign runs, I'm gonna look deeper in this.

Full campaign runs aren't very active in an already inactive game, so maybe a moot point but figured I'd throw the thought out there anyway