I am sure they do not.
How are you sure? How can you know how Taekwondo is taught around the world?
Frankly, and this is based on my experiences in multiple clubs in multiple countries, there is real evidence to suggest that you haven't the faintest idea how Taekwondo is taught or how much or how little students know of sport or self defence.
Every club I have ever trained with has clearly delineated between competition work and self defence, and placed emphasis on realistic and simple core techniques with a high percentage chance of success for self defence.
Your arguments aren't supported by facts, in fact they read like Youtube comments, and as such they carry little weight here.
Gnarlie