I suspect it has approximately nothing to do with what the patch implemented. And a lot more to do with it being effectively a guide to reverse-engineering the game executable. Paradox makes multiplayer games. They probably saw this as How To Cheat 101.

As to not wanting to do the work to make it implementable without a binary patch, well, it's just not in the game. I can imagine hesitance to start modifying the game based on demands of modders for multiple reasons, even if they liked the mod itself.