Since this half debating dc canon, its worth pointing out that dc canon is that anyone with an orange ring goes crazy
DC canon is that anyone with ANY non-Green non-White ring goes crazy in some way or another; it's just different kinds of crazy. Orange-crazy (and indigo-crazy) is just a kind of crazy that normal humans find especially difficult to comprehend. People can kinda "get" how red-crazy or violet-crazy works. Blue-crazy is a kind of crazy that can be misinterpreted as virtue outside of context. Yellow-crazy is particularly insidious because it's INTENTIONAL instead of just a side effect.
Oh, I'm aware of why humans see in the range they do, and your description is accurate. What I'm saying is that the edges are essentially random, in the context of fundamental forces of the universe. If humans could see a bit further into the infrared, then regular red wouldn't be one of the edges. Or if we could see less into the higher energy part of the spectrum, violet might be the edge in that direction instead of indigo. As it is, the emotional colors span the entire human visual spectrum but no more.
My point is that there's no particular significance to red and violet being the edges of the spectrum. The only one that really matters is that Green is in the middle and the rest spreads out from there. If there's an "infra-rage" or an "ultra-love" then I would imagine that they're not particularly universal in their visibility, just like infrared and ultraviolet.
In fact, the presence of Indigo suggests that the spectrum's curve ISN'T calibrated specifically to human eyesight because the high-frequency components are spaced closer together than the low-frequency ones. Maybe humans aren't very good at seeing love? It would explain a lot.
As for the emotional lights influencing human evolution, I'm not sure I can see the mechanism. Aside from the rare magic user, I'm not sure in what scenario one of the emotional lights would actually manifest as actual light. [Emotion] magic doesn't seem to be common at all on Earth 16, and no one aside from those who had dealt with Lanterns seemed to even know what the emotional lights were.
Also, if the emotional lights did influence our evolution, would they have not also affected the evolution of every other species on Earth? Some other species can see into different reaches of the EM spectrum.
I'm not saying that the emotional lights influenced
human evolution in specific. Humans are kind of a backwater, as potentially-spacefaring species go. I'm saying that in places where it IS more visible that they would comprise further pressure to have vision encompass it.
I'm also suggesting that the emotional spectrum represents some fundamental truths common across all species that have evolved emotional self-awareness, whether they're visible as light or not.
Basically, I'm saying that it isn't a coincidence that both the lights and the emotions fall inside a range that humans are capable of experiencing, but rather that the nature of the universe makes it to where most intelligent life would have them in common.