So you are basically giving your opinion on the comparison of Taekwondo and Tang Soo Do based on no experience with Tang Soo Do and experience with Taekwondo which is limited what goes on in your city.
But over and above that, what makes you think that "traditional" = "self defense", at least within the Tang Soo Do context? GM LEE Won Kuk was not opposed to competition; in fact he encouraged it. For example, we hear the story of Chung Do Kwan GM UHM Woon Kyu being called "sliding side kick god". Well, he gained that nickname when they used to spar, under GM LEE Won Kuk, during class in the 40's.
GM HWANG Kee also encouraged competition or "sport". From what I understand, GM Hwang was one of the early leaders of competition. He was host to the first international tournament in Korea (1957 I believe) and took Moo Duk Kwan members to Japan to compete, in tournaments, in the early 1960's. During the first trip to Japan, they brought back the first four chest protectors, which are now so common in Taekwondo competition. So the "tradition" in Tang Soo Do, was on competition. One step sparring, for example, was not for self defense but for competition. That's why it's called one step sparring, as opposed to one step self defense.
And why do you think that "sport" focused techniques cannot be used for "self defense"?