As far as TKD as a whole, that always seems to be the consensus, but it isn't in my school and that's exactly why it's my school.
We train "TKD, the MA" and "TKD, the sport" as two separate entities. Because they are. So many people say "you could never defend yourself with sparring techniques". I agree with this to some extent. But you also cannot bring your street techniques into a sparring class, though in my school, many have tried...once.
We practice not only the common kicking and blocking techniques but equal time on strikes and take downs. For the more advanced students that show they can handle the responsibility, there are also certain types of kicks and take downs, submissions, etc., that are not commonly practiced in most TKD schools. Not even most of our own students see them. Students must be more responsible because it takes a high degree of control, both physical and mental.
Our general curriculum is primarily for self defense. Students can pursue sparring if they choose, which are held in separate classes. However, unlike many schools in my region, it is are not required, and not practiced in a regular class.
As is the case in your school, strict decipline is adherred to without exception.