I think that you have a point here. I also think that marketers have long ago realized that women have a lot of sway in purchasing power. Either by their ever increasing earning power, but also because they get suckers like us to buy them things. So yes, women have aggregated purchasing power, and product marketers know this. So they sell more intensely to the female gender.
This is just my opinion. I am sure many other things may come into effect.