Because it's there... Actually, it looked cool in the brochure. Would I order it again? No, but I'm not bothered by it, and like I said, my daughter LOVES it. Talk about a way to teach a kid her colors...
Plus, maybe you don't know this, but it can be left turned off, so it's not like you have to have it lit.
I like the ambient lighting in the pic. Darkfire, The two toned seats in the the lower pic is like the ones in the GT I was looking at.