MichiganTKD
Master Black Belt
I'm not sure if she was saying BotF roundhouses do not work. And it's not that I believe they do not work. They do work and have their place. They just are not as fast as instep roundhouse kicks.
As far as instep front kicks, we do use those in free fighting to prevent accidents. Otherwise, it is always the traditional front kick. Likewise, we use the bottom of the foot for side kicks in sparring for the same reason. Free fighting by necessity requires some modifications in technique to prevent accidents. It would not take much, contacting someone's ribcage with your heel during a sidekick, to send them to the hospital. This is why we also do not use the ball for roundhouse kicks during sparring.
As far as instep front kicks, we do use those in free fighting to prevent accidents. Otherwise, it is always the traditional front kick. Likewise, we use the bottom of the foot for side kicks in sparring for the same reason. Free fighting by necessity requires some modifications in technique to prevent accidents. It would not take much, contacting someone's ribcage with your heel during a sidekick, to send them to the hospital. This is why we also do not use the ball for roundhouse kicks during sparring.