Why does hair only grow in specific areas?

I know it's genetic but in general hair only grows in the same places for everyone, there might be some small hairs in specific parts or even some long in other less common areas but for the most part it's in the same spot for everyone, head, eyebrows, facial hair, arms and legs, one would argue we evolved to what we are from monkeys but not only do monkeys still exist so I don't know why some didn't evolve but their faces are different but that's not the point, my point is that they have hair everywhere and so do all their monkey friends, so it's a species thing but why do we have specific places with hair like eyebrows but out cheekbone follicles don't grow long hair like other parts of the face? Genetics make differences but what makes the similarities ๐Ÿค”
Why does hair only grow in specific areas?
Post Opinion