[dlivingston]

Because my taste and interests are more aligned with person X than with the general populace.

[bduerst]

Are you sure it's that and not that you self-identify as being person X? Just how well do you know X apart from X's name as a brand?

[dlivingston]

While your question is interesting as a psychological thought experiment, it does not matter pragmatically.

If I am interested in, say, sci-fi, or futurism, and so is person X - or, person X's marketing image - then person X will bolster their brand by posting sci-fi and futurism books.

Therefore, I still get recommendations in the genres I'm interested in, and whether those recommendations are accurate portrayals of person X's interests is irrelevant.