He'd punch people in the gut. And they'd react as if punched in the gut.
I'm saying that no one, no exceptions, should be able to specifically target those points with the express purpose of disabling them.
You can still punch people in the gut. That's a time-honored method of punching people. You just can't punch them and magically make all their powers go away.
Especially since, in canon, it seems to need to be someone who is very accurate and precise with a sharp cutting attack (Quincy arrow or sword), rather than something like a punch
Edit: And by "those two points", I specifically mean the Chain of Fate (Saketsu or chain link) and the Soul Sleep (Hakusui).