I'm of the opinion that attraction is biological and immutable.

This sentence is probably the reason you are being downvoted- not sure why no one is engaging the discussion, though. (tsukinon may be crafting a response right now, but idk.)

The thing is, what I find attractive has absolutely changed over time, and has been affected by outside forces in my life. (The way people who were kind to me looked, the way people who were mean to me looked, what became more common in my life vs. what became less common. My interests and the appearance of characters in fiction that I love. So on and so on.)

There's a basic template that you have to come close to in order to be attractive, sure. But there's a vast array of what different people find beautiful. It varies from person to person. It's such a subjective thing that treating it objectively is nonsensical.

Which makes

If less people find you attractive, you're less attractive. That's what the word means.

sound sort of silly. If a majority of people find you less attractive then maybe you are less attractive. But it's probably not that you're biologically unattractive. What the people in this sub are saying is that there's a social history that black women have where the culture around them decided that they were less attractive.

If you ask someone why they don't find black women attractive, for example, you'll probably get some pretty stereotypical responses. Instead of, "They have big lips and big noses and the color of their skin is a turn off for me," (physical traits), you'll get, "They're loud and bossy and angry. They aren't soft and don't let men treat them right." That sort of thing. And that's the kind of thing you can't really determine until you talk to the person.

Check out this wiki for more.