Experience is not fact. Saying “racial origin is NOT a determining factor for developing hyperpigmentation” is simply silly. Such a statement is in disagreement with every text ever written on dermatology and every physician I have worked with and my own experience of 30+ years.
The point is you cannot “go” from a few observations and ramp that up to “scientific fact.” Nobody should rely on “what I have seen.” Yes, observation is very worthy of note, and stimulates more scientific research, but a few observations are not therefore FACT. “I ‘seen’ it and I believe it!”
Racial and skin-types are one of many factors to consider when doing surgery, laser or electrology (micro-surgery). For example, blacks “tend” to develop keloids. Do all blacks get keloids? Well, NO of course not. But if you don’t consider these parameters you are not doing the patient any good. White people can get keloids too; but not as frequently.
When I work on, say, a Persian I tell them that PIH is a likelihood. With this warning they are not “freaked out” when it develops. Usually with very white people, I seldom mention PIH, because it seldom happens.
Are there “other factors?” Of course there are; medical science is full of situations that don’t fit the common understanding. But, for God’s sake, do throw out the entire book because you have made a “different observation.”
Sometimes I wish I smoked pot … or got drunk! But, alas, I don’t. Maybe I should? Happy Easter!