True practical fighting and people that want to learn true martial arts skills to protect themselves. It will draw in the kids and families that want to do sport that will do nothing but self gratitude. Don't get me wrong. Self improvement is part of the martial arts but not flipping around. You don't see that in other arts besides Chinese arts and TKD. But chinese arts also focus on pure selfdefense as well. Also add hyungs do contribute to fighting but yes it is not fighting.
There is a certain degree of showmanship in a variety of martial arts. In regards to this issue, it demonstrates the divided opinions of what tkd should look like. Frankly, the majority of schools have promoted this high octane, youth-centric paradigm. When tkd decided that a child was worthy of black belt, it ruled out maturity and wisdom (sorry, folks, maybe you think your teen is mature but let us be real wisdom and maturity come with age and cannot be rushed.) Physicality is highlighted in tkd over the latter points. Young ppl are capable of it. Older ppl not so much. That is why you do not find so many adult students.