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!
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.