Sorry but you are incorrect. Pros have every thing custom tuned, that doesn't equate to off the shelf bikes. The idea behind a WSD is to eliminate needing to swap a lot of things.
My wive's first bike was before WSD. I had to swap the seat, shorter cranks, thinner grips, shorter stem, swap out the spring in the shock etc...
While I don't think the tubing is any different, the idea behind them is sound. Just because it doesn't work for every women doesn't mean they have no value.
Just compare the Rumor to the Camber since they are same brand and travel.
Small Rumor ETT 545mm Crank 165mm Stem 60mm bars 680mm Small Camber ETT 555mm Crank 170mm stem 70mm bars 720mm
Med Rumor ETT 570mm Crank 170mm Stem 75mm bars 680mm Med Camber ETT 587mm Crank 175mm stem 90mm bars 720mm
Does any of this mean a women can't fit on a mens bike- of course not, but for those women who fall into the average build for a women, it can save them the hassle of trying to get a mens bike to fit.
What exactly am I incorrect about? While it's certainly true that professional riders have a lot of customization done to their bikes, they certainly don't alter the frames; which is the primary difference between a Men's specific bike and a Women's specific bike. Last time I checked there's no such thing as Women's specific forks, shocks, cranks, component sets, brakes, wheels, tires, etc. That being said, what does it say about Women's specific frames when an overwhelming percentage of professional female riders choose to start their customization process with a Men's frame?
Also, since you compared the Rumor to the Camber, here are some other interesting data points to consider:
Rumor Expert: MSRP $4,200, frame M5 alloy (front triangle) / M5 alloy (rear triangle).
Camber Comp: MSRP $3,800, frame FACT 9m (front triangle) / M5 alloy (rear triangle).
NOTE: Isn't it odd that the cheaper Camber Comp is carbon and the more expensive Rumor Expert is aluminum?
Again, I still stand by my advice to the original poster - Dollar for dollar, you get more bike when you buy a Men's bike than you do when you buy a Women's bike. In addition, I'll add this... If your wife happens to 'fit' a Women's specific bike better or she feels more comfortable with lower stand over height or she just likes the colors better, then by all means ger her the bike she wants.
Just my $0.02.