It would, if it was possible for evolution to come up with a system that would use it all / most of it without any associated dangers. Apparently it was not - the problem is if you absorb light energy into a system that is meant to convert it into chemical energy, you have a problem if you can't use all of it - side reactions might result, leading for example to damage to the photosystem, cellular components, DNA. It appears the green light was simply too intense for plants and it was better to make use of the less intense but safer red and blue components.