If you are saying beauty has some degree of objectivity because we share some common genetics that predisposes us to develop similarly, I understand what you're getting at, but it's still completely subjective.
Not quite what I'm saying. Beauty and goodness (being fundamentally identical) are attributes of objective reality. Subjectivity is the confusion of our limitations for the eternal truths of the universe. I hope this makes my position more clear.
I wouldn't say that I agree. I don't think a delusion of any sort is produced. If something is beautiful (which is objective), saying "it is ugly" does not make you ignorant so much as it makes you simply incorrect. Calling beauty ugly is equivalent to saying "truth is false", which i would argue is a "problematic" view to hold.