Absolutely agree! And that is a point I have tried to explain to people in the past that often goes right over their collective heads!
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So "Wing Chun Boxing" uses that Boxing engine or biomechanic as the base, and adds various Wing Chun methods to it. Very similarly, Panantukan uses that Boxing engine as a base and has added FMA methods to it...such a limb destructions, joint-locks, etc. Boxing is a time-tested and proven fighting system. So it just makes sense to use it as a base and see how we can adapt and "stretch it" a bit.