What exists? The market? No one has said it doesn't.
OK, let me elaborate.
'The Market' is the term I use for a free system of buying and selling. Suppliers offer their products and buyers are free to choose what they think is the best buy. Prices are determined by supply and demand. High supply reduces prices, high demand raises them, so prices are determined by the 'Law' of supply and demand and you can observe that law in action everywhere from the Commodities markets to the sale of illegal street drugs.
Just as Newtons laws make no distinction between the Saint or the Sinner falling of a cliff (they both accelerate at about 9.8m/s/s) so the law of supply and demand has no moral dimension, it just works. However, it will tend to 'punish' discrimination.
To return to the case in hand, if a particular retailer were charging women higher prices than men it wouldn't take too long before word got around and other retailers anxious for the business made it know that they did
not discriminate and the original trader would 'mend their ways' or go bust. I remember in the 1980's I was in the States and there was a lot in the media about businesses 'chasing' the 'Pink Dollar'. Business's had just cottoned-on that Gays had a lot of money to spend and were going mad to get a slice of that market.
So there is absolutely no reason to suppose that the market for women's goods is actually 'rigged' against them. The market segments defined by 'Male' and 'Female' are pretty broad, but what I suspect is happening is simply that women (on average) tend to be more discriminating in their choice of goods than men.
If I can give an example:
Although I normally use an electric, I have a cheap Wilkinsons razor. I use it only occasionally and it is very basic but it works fine. My wife purchased a female razor and it is very stylish and comes in a nice case but it was several times the price of mine. Occasionally she can't find hers and uses mine and it works equally as well - so she has paid more for something that does the same job but (maybe) has a perceived higher value. Of course there is nothing preventing any woman buying a mens razor.