Are you sure? I went back and reread the definition, it specifically says perception of color. And how it is being used in the marketing? Users perception...
It works because people want to be told that the cameras they buy are precision instruments backed up by science and fact. Most believe that what they see through their eyes in in fact the image focussed on the back of the retina, that things are absolute (including colour) and can be measured and recorded accurately where they will be seen accurately by the human eye. It is also true that most still think that colour theory describes the way colour works, where in fact it actually describes how the eye works.
Things were really shaken up by Newton when he split white light in a prism. In all it was discovered that there were around 200 visually perceived pure colours. Which raised a problem, if we saw colour accurately then only about 1/200 of the receptors in our eyes will be working when we view the world through a yellow filter. You would expect the image you see to be considerably darker as a result. But it isn't, brightness is maintained. The only conclusion was that the eye simply didn't work as an accurate recording device but maintained a consistency of vision in a wide range of different light conditions.
The actual way that the eye works was revealed by additive colour theory. It was discovered that we can reproduce nearly all visible colour by just using light of three different wavelengths, it does not prove that all light is RGB but that the eye only has three main colour receptors.
Cameras mimic this, they try to maintain the same consistency of vision as the human eye does in a wide variety of lighting conditions. This creates quite a contradiction, because the human eye does not see colour accurately it follows that the camera that reproduces colour the closest to how we see it must also record it inaccurately.
But we wouldn't buy many cameras if we are told that we don't see correctly, that our vision is flawed and therefore we've designed flaws in our camera to compensate, it is not as precision as you think nor as accurate as you wish it to be. Instead they are sold on their ability to achieve *your vision*. However because many want to believe that their vision is absolute so they also believe that the camera with the most visually accurate colour, what they see on a computer screen, is also the one designed to most accurately capture colour. In a way *colour science* is created by users to support their belief that their vision is absolute, what they see is correct.