bro that's who's raw physical strength alone makes blast of air whether it's through a punch or a kick.
Luffy hasn't shown anything close to any new raw physical feats as he did in pre-timeskip since then. Deku's flicks alone has more power to destroy shit than any fist from Luffy has ever shown when it comes to raw strength. That's why Luffy creates the gears in the first place because he lacks certain physical attributes he couldn't do alone with his raw physical strength alone.