Maybe not the TKD you teach. Others teach TKD that is very effective for self defense. I'm guessing your training and focus is strictly sport TKD?
No, I have been training "traditional" Taekwondo over 30 years. ( Both WTF and ITF ) and I still believe that Taekwondo is not most effective for PURE self defense training. For those who are looking for ONLY self defense, then I recommend to them Krav maga, Systema, Defendo, Keysi etc.