Actually, this seems a lot less disturbing to me than if, say, there were many different colours for boy clothes, but only pink clothing for girls. If you wouldn't feel obliged to avoid dressing a baby boy in blue, why feel obliged to avoid dressing a baby girl in pink?

I think clothing of both genders gets more varied with age, but faster for males, at least at first. I note that women actually come out ahead, with both pants and dresses, yet young boys wear noticeably more varied outfits. Clearly it clearly varies a lot with age.