You read WAY too much into what I said my man.
It really doesn't matter the 'how' of Goro and Kagura sharing power, whether it's some sort of shared pool or (as Diamondhead confirmed) Goro borrowing it from her or what. The point is that, however it works, it allows Goro to take Kagura's power and use it for himself without having to ask her permission first- and in most cultures, "taking something without permission" is synonymous with "stealing".
I never said anything about him stealing peoples' cores or whatever. That is all on you.