You're literally using those arguments while telling me I am fighting the arguments you're never made.
The point is that abilities matter regardless of portrayal. So looking at things from the perspective of abilities should matter as much as portrayal does. Actually, a character's abilities are an integral part of its portrayal. You can't expect people to blindly accept Law's abilities work all the time while you leave no room for the opposite team using portrayal as an excuse.
You probably missed the parts where I always rank Law above King and Katakuri in power level the same way you and I put Big Mom over Law, but it's a different story when you put them against one another. Law has 0 counters against FS coupled with Katakuri's shape-shifting, so he's got no hope against him. With King, he has his chances via the element of surprise as he's got abilities that can work around King's defense—I literally always acknowledge this. You guys just irrationally expect us to blindly sit here and say Law just magically counters everything coz he's Law. That's not how it works.