I had a little rant about this in the ask women anything thread earlier.
I am not the same height or proportions as an average man. There are definitely garments that could work as unisex - for example, skirt styles that only need to be close fitting around the waist. However when you see something labelled as unisex it’s never a fucking skirt, is it. It’s a pair of jeans that I wouldn’t be able to walk in or a top that would look like a tent on me while also somehow squashing my (not even particularly large) tits.