I didn't explain myself well - I understood what you were saying before. My point was more about the fact that common Night Elves we play now, (and are most often depicted) are not often depicted with silver hair. That is a trait that most lore people would think of Azshara and the Highborne - which had little to do with Elune or any worship of the moon. Some Highborne actually cared about their goddess, but most only cared about magic and Azshara. Thus, it would defeat the purpose to make people connect the dots from white hair -> moon worship, literally or aesthetically, since it is almost always associated with a group of people who care little for that. I feel if Blizzard wanted it to so, they would have made more Night Elves with white hair, and perhaps made the Highborne with another color of hair.
While it would make sense to have white/silver hair be a very common thing for the general population of the Night Elves, they are more often depicted with green hair for their affinity to nature, or dark blue hair to represent the night.