Does thick and long body hair prevent water from reaching the skin during ghusl from janabah, thus necessitating rubbing it, or is it not considered a barrier and water reaches the skin without it?

Among the conditions for the validity of ghusl from janabah (major ritual impurity) is ensuring water reaches the roots of the hair, whether it is long or short, thick or thin. Thick hair is considered a barrier (ha'il) if it prevents water from reaching the skin, so it must be rubbed to ensure water reaches the body beneath it. The definition of a barrier in wudu (ablution) is anything that has a physical body that prevents water from reaching the skin.