That's not what he fucking said. He said JUST BECAUSE of that, meaning he needs OTHER stuff, not that he is not going to punch.
Seriously, do you have trouble understanding what "just because" means.
Definition of just because. : for the simple or single reason that
Oda said that his physical strength BY ITSELF is not enough. ACoA =/= Physical Strength. You can blast it without moving a single muscle.
In fact, Hyogoro told Luffy you are using too much force when training ACoA
"You are using too much brute STRENGTH" -> Exactly what Oda said.