I pretty much agree with your points and would like to add that, at a few times in the movie, straightened hair was described mostly by Asians (but IIRC by one Black person) as being/looking "more natural."

Yes. Really. Hair that is straightened with Lye/Hot Comb is "natural".

And these were candid, off the cuff, stream of consciousness remarks ... the implication that there's something unnatural (which is to say "wrong", "corrupted", "tainted" or "perverted") about the intrinsic qualities of African hair is, well, flabbergasting and even a little frightening.