That's because Obsidian made it for New Vegas. Not Bethesda.
So what? Bethesda is going to get sued for using it? As long as Bethesda gets obsidians permission, which shouldn't be hard.
let's not get negative now.
Kaizen, continuous improvement. It's not negativity, it's called making something that's already good, better. Never maintain the status quo, always improve on what you have already. Without motivation from us, Bethesda will never become better.