I have been practicing for 2-3 years now and never really had anyone to teach me so maybe that is why i fell so much doing the Kong. I think that this may all just boil down to experience.
As for the comment about untrained Tae Kwan Do, you don't know what you are talking about, if someone can kick me at head level with enough force to hurt me then they have been training for a long time, and if they can make contact with me
even longer. It is the job of the higher belts to train and show the lower belts about control and part of that is being able not to get hit. Granted if 2 kids started sparring without training they might hurt each other, but you said the same thing about Pakour.
As for Parkour and what i am talking about is severity, I personally always have and will train outside, this means most of what i train on is contreet and metal. When i fall i fall onto contreet and metal, If someone has not fallen doing parkour then i am impressed. I would rather encounter the force that i encounter while falling if it was directed at me in an attack.
I also would like to say that its not always about how well or safe you train, you can always make a mistake and fall. I am simply saying that falling whilst doing parkour, for me at least, means falling onto metal or contreet, (or when i was getting started wood chips and grass). And these things hurt a lot more than mats and pads.
Also about the comment of "improperly learning" being my problem, yes that might be part of it, but no matter what you say the monkey and the Kong always has the inherent risk of clipping your toes and rotating over your center of gravity and going head first down the other side. If i am wrong on this please let me know, but it is some thing i have been aware of since i nearly put a shrub through my collar bone.
Maybe i have been moving a little to fast in my training and yes i have taken risks simply because i am young and agile, but i feel that i still train solid "parkour" and i spend most of my time drilling thief vaults, QM, vertical wall runs, pop ups and rolling. I also supplement my training with running, biking, martial arts and muscle training. I also stretch, a lot. If there is anything anyone thinks that i should be working on please let me know and i would be more than happy to try it out.
what i really want to point out is that doing Parkour might not mean that you get hurt more than other activities, ( i think it is less often), or that you get hurt worse, simply that the worst case scenario in Parkour is much closer to the surface, that is that you are more aware of just how wrong things can go. I am pretty sure we are all agreeing about the same stuff so i hope that this puts my view into better perspective.