Being etiolated from light deprivation is not the same as albinism. I have found various sites that point out various flaws in the genetics of Middle Earth. Although Mendel started his experiments in the 1850s it is fair to say that it was still a very new branch of science when Tolkien was writing and I wouldn't think that errors would cause much impairment of the work.
Pale isn't the same as albino ... I was at school with a girl who was affected by it and it was far from cool. Aswell as lacking colour in hair and skin it always affects the eyes - in vision if not coulour - and she had a serious visual impairment. Elves certainly don't suffer from that.
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“But Finrod walks with Finarfin his father beneath the trees in Eldamar.”
Christopher Tolkien, Requiescat in pace
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