LaPlace,
Being young (I am guessing under 30), you do not realize how old this unfounded critique is. It is older than you. Not only as far as TKD and MA is concerned, but other venues as well, The same guy who wrote the Steve Jobs Bio, has another book called "innovators" (Mainly based on electronics and computers) and addresses how as things are developed there are few quantum leaps, and more incremental changes.
He also addresses how some histories refer only to collaborative efforts as opposed to individual developments (Do you an anology to TKD?)
The same applies to "Modern" MA systems. You critique General Choi for basing his system on Shotokan, when in fact he readily acknowledges the strong links to the same Shorin and Shorei roots. Yet you refuse to critique other notables such as Ueshiba, Kano, and Funakoshi who developed systems yet differentiated them from their roots as well.