Although you are highlighting the differences of Sativa and Indica, the success of HEMP /CANNABIS and the now increased interest in the product as a food OR medicinal product comes from the medical discovery of Cannabinoid receptors in the human body.(CB1 and CB2) The studies showed that treatment with cannabinoids opened up new medicinal paths. The cannabinoids are now being found in foods that were never thought to have cannabinoids in them. Black seed oils and other plant based foods are now coming to the fore front.
In reply to the original question posed, I think that hemp seed is HIP in that it is still very much mysterious
to people, but its really the past history of Cannabis that really highlights its HIP -ness.