Well sometimes you get 44B, 6A or 1B blocked and you throw out the RO B but hit G just incase your opponent might backstep/sidestep the attack which will cancel out of his stance. Next thing you know boom smack them in the face for trying a TCing move and your back in neutral as they crumple in agony. This happens to me against certain characters (I'm lying it's just Mitsurugi lol) so I find value in knowing them.wait, why would we go for tech traps after RO B on hit?
Also getting some of them nets even more damage then finishing the combo with brave edges. If you know your opponent likes to tech left then why not read 'em like a book.
It is also best to know more shit then you need too.