Alright, I get what you're saying while I agree that no whiff, air parries and OS's are all advantages of the SFIII parry, I think it's justified due to the execution. Yes, even the OS's to an extent. The lack of accessibility and risk taking makes it reasonable imo.
But the way I feel is that while the button input is a bonus for amateurs, experienced players can easily grow to manipulate that tool. In the video I was looking at outside of no air parry and whiff animation, it's still a powerful defense mechanism that's accessible and exclusive to Ryu.
Basically my problem is I see it as a powerful defense mechanism that's exclusive. Since the purpose of the parry is to nullify an attack. Meaning those with good reads will be rewarded.
Like I'm not comparing the two styles, just find it as a bad decision to make that kind of mechanic exclusive.