I don't count all white haired anime characters as 'albino' it's when they have at least 3 of the key features, (lack of pigment in hair, skin and eyes, and yeah I know that you don't need all three to have Albinism but for anime characters specifically I tend to go with that rule because of the hair colours) that I would conciser them so, or if the anime / creators says that's what they are or that's what the character design is 'based' off of. Then at that point it's just fact.
And there are actually a lot of characters that are legitimately based or inspired of albinism just for the looks and disregard the actual disability behind it because holy hell do us Asians glorify pale ass everything on people. (I guess it's kinda like when people will praise someone for being thin or skinny when they are suffering from a health problem or an eating disorder. They don't care about the details on how or why, just that you 'look good')
EDIT: Also doesn't help that white haired anime characters have seemed to develop a really weird ass fetishism for Albinos among their fans DESPITE the character being albino or not. I mean, I know that I shouldn't be too surprised as lots of things get turned into fetishes but the ones based off disabilities while at the same time ignoring the disability part of the disability are really weird.