Natural long hair will mat down aka dread locks, which leads to destruction of the hair, I assume that is why they invented the come.
A young child's hair never comed will turn into such a mess that it has to be cut off, in some animals flys will lay eggs and magots get into the dead hair and then enter the skin and actually have killed farm animals, etc...
Nothing is worse than long dirty/messy hair, while well combed hair is beautiful. Hair will pick up the odors from the environment and that alone makes most people wash their hair commonly.
As we get older, we get lazier and older people choose short hair or if their hair isa disaster, they shave it all off.
Natural is Best, but may be a handful to deal with. I can't imagine what Native people did to cut their hair off.