I think that before putting forward a new theory, it is necessary to refute the old, generally accepted one or enter it into the concept.
For example, why does a transplanted hair continue to live on a seemingly inflamed place? Or why the transplanted hair from the forehead to the back of the head is not restored? Why do some people lose their eyebrows along with their hair? With this theory, there are more questions than answers.
Based on your examples, we can definitely say that the hairline, as apparently the hair itself, depends on the structure of the skull.
For example, why does a transplanted hair continue to live on a seemingly inflamed place? Or why the transplanted hair from the forehead to the back of the head is not restored? Why do some people lose their eyebrows along with their hair? With this theory, there are more questions than answers.
Based on your examples, we can definitely say that the hairline, as apparently the hair itself, depends on the structure of the skull.