I have seen plenty of junk science in my time, but I would not put this in that category. The way I see it is that when you have a trait that is universal to women (or whatever demographic group) regardless of where they are in the world, it makes good sense that it has a biological basis.
because red is associated with riper fruit and healthier faces?? That’s the junk I’m talking about
It doesn’t explain why men prefer blue.
Perhaps so, but it's hard to tell for this study so far. The article states that study was on “a group of men and women”. I assume (!) that the formal publication goes into more detail and justifies the leap to biology, but Prof. Hurlbert doesn't have it available on her web page yet.