Kinky hair does need more moisture than straight hair. Just like how long hair needs more moisture and care than short hair. It isn't really a good hair/bad hair issue. The scalp produces sebum which is a natural moisture for the hair and scalp. With straight, short hair, the sebum is able to travel down the entire shaft of the hair whereas with kinky or longer hair it's not able to do so. The thing is that all the coils and bends that our hair makes, makes it difficult for sebum to run down from the scalp to the ends of the hair. Hence, we generally need more moisture.

The real issue here, in my view, is that we tend to confuse greese with moisutre. Given that our hair is sebum deficient, what we need are moisturizes that can mimic sebum. Greese does not do this, but you can get a similar effect with glycerin, lighter oils such as jojoba and coconut oil, and off course leave-in moisturizers. Some naturals even have a really simple haircare regimen where they just wash their hair with conditioner frequently and don't use any moisturizers. I can't get away with that but as long as I deep condition my hair regularily, I can usually get away with just moisturizing my hair once every two or three days and my hair still stays soft. My scalp also produces a lot of sebum so I usually only moisturize the last four or so inches of my hair.