I made a mod that removes the fighting with the fabricator in Eco Lifestyle, am I doing this right?

Editing tuning files is not the same as scripting, btw.
It's safe to do it that way most likely, but override mods always have a chance at "breaking", especially when it's from a new pack that will probably receive updates for the coming months. You should be good though, even if there is a change made in a patch it won't crash your game or anything.