Is the speed of light always the same because it is trying to maintain its cohesion and niche?

Question

The speed of light is always the same, no matter what relative speed one is going. If a star is moving toward you, projecting light, that speed is not added to the speed of light. Light blue shifts, and changes its course through time. Same thing happens with a red shift (say, with a light source moving away from a person), the light changes its movement through time in order to compensate.

The question is, "why does light do this?" Is it neccessary so light can retain its cohesion at that speed and not fly apart? Is light striving to maintain its energy niche by red and blue shifting? Is it an adjustment born of neccessity?

It may be true that in a dense environment, like glass, light slows in speed. Glass acts like a haze, slowing light down. However, in the case of a star moving toward you or away from you, (blue shift and red shift) there would be a DIRECT input if speed was added or taken away. That might cause the beam to shatter (if speed was added) or cause it to rupture as it slowed down. The direct application of extra or less speed might be a defining factor.This direct application of extra speed might impact the specific resonance frequency of light. When a glass is stimulated by sound at its own particular frequency, it shatters. If a star was moving towards a person that could theoretically happen, because the application of extra speed could "get inside" the light beam, breaking it. Indirect application might not make the same difference, because the energies that slow light down are not on it's specific frequency and therefore do not cause a direct resonance application. Thus, light blue shifts because it is avoiding the direct application of extra speed from a moving body, such as a sun that is moving towards a person.

Answer 1

Light speed never changes because it is a constant. It is a measurement.  Just as an Inch is an Inch.  

Answer 2

Light is not light but many lights each having its color, its frequency in its wave particle form. Light is chosen as a constant because changing its relative velocity changes its relative definition, changing it to something else for the observer in the observers relation to that exact time and space of that exact light. The various lights in white light have a difference in velocity as they do in the frequency in their wave form. This is evidenced in the separation of white in prismatic spectrum analysis where white in one side comes out as the color spectrum of that white lights specific composition. I theorize each of the color light spectrum, each having a different velocity and as a result of that difference have a different response to the angle incidence resulting from impact with the glass prism and its form (equilateral triangle solid) and separating their relative trajectories into their own distinct angles. If this is not true, then their relative masses are different and thereby infer their relative energies are different. Light gains or loses energy as is externally determined in its specific contingent context.