The genius which goes into getting these images is astonishing, and I'm not meaning to disparage that at all! The damaging part is when they colorize an image and then call it "true color", when this is simply untrue.

As an example, here's an actual true-color image of the earth: http://imgur.com/EEt635V.jpg

And here's a "true-color" image of Earth, produced using the New Horizons / Huygens colorization technique of combining a greyscale image with very low-resolution color data: http://imgur.com/IOqOTyw.jpg

What's wrong with this? A.) It flat-out isn't "true-color", and NASA shouldn't be spreading inaccurate information, and B.) It's arguably a more boring image than the greyscale original (http://imgur.com/hwYA6VK.jpg), which leaves one better able to imagine possible color schemes, rather than fixating one upon a single, inaccurate, and very boring color scheme.