Though it is still popular to try and link TKD to Hwarang warriors, the truth is that there is no direct connection at all, even through the tenants. If you actually look into the whole Silla dynasty you will find that it was not such a romantic time period as people would have you think.
No time period was romantic. not even the romantic time period.
Lofty ideal are put in place because the reality looks vastly different.
That includes the rules of chivalry of the European knights just as well.
I am sure the inception of TKD was not romantic either.
However, in the root of TKD are numerous arts and traditions that have a base in tenets and rules that rein in the force.
be it the Bushido, via Shotokan Karate, or the principles of Buddhism...
While it may not have been spelled out by the KKW, I have my doubts that behavior like the one we are talking about would have gone over well. Actually in either above mentioned society...