I do think the unconscious aspect of the problem is a key piece here. I think there are natural women (maybe a lot, maybe not) who are telling the world how much they love all hair textures, but their youtube and instagram follows tell a different story. It isn't socially acceptable to admit that you prefer/wish you had more caucasian features, but plenty of women still do, even if they'd never ever say it.
There's a girl who says her sunscreen is for her health, but deep down just doesn't want to get darker. There's a girl who swears her four hour max hydration method is for healthy hair, but really she just wants curls. Are these people the majority? Of course not. Is wearing sunscreen or doing the MHM a bad thing? Of course not. But our posts and likes and 'preferences' (both real and defensive) don't exist in a vacuum - they intersect with an ongoing societal discussion about what's acceptable and the message rings loud and clear.
now don't yell at me