In reality its a massive fucking problem. This is why so many women end up wearing men's clothing, which doesn't fit their shape at all, just because they're the only things they can find that they can actually fit into!
What special snowflake part of the world do you live in that any woman can walk into any clothes shop and find clothes that fit? Because I call bullshit on that.
Not saying it isn't but the part that's hard to understand is why can't a new brand or a sub brand fix it? It seems almost trivial to label differently, and solve a problem worth solving for and earn money?
And no, don't tell me why existing brand doesn't do it, like all the other replies here.
Based on the article, several brands have clothes that range from the low 20s to the mid 50s which covers essentially all waist sizes. If a woman has a 55 inch waist or a 20 inch waist she cannot buy pants at American Eagle but I wouldn’t characterize it as a massive problem. In fact the article identifies exactly where such a woman could find pants.