Yes they are about 9-1 sport vs traditional, I see your point...
So, until that changes, people are probably going to keep thinking what they are. Now, everyone will have their preferance, and it sounds like you're teaching both, so I'm assuming at least in your school, someone will have 2 options....sport or traditional. Do you mix the 2 or keep them seperate?
As I said, I'm not a TKD guy, but it seems to me, much like with everything else in the arts today, that people will go with the current flavor. Pre-1993, it was rare that you saw many schools offering some sort of grappling/BJJ program. Enter the UFC, and what did you see? Every school on the block was offering BJJ. So, if sport is the more popular flavor, then people will cater to the public.
Just my .02. I may be wrong on this, but again, its just my observation.