That's not true at all. Sometimes the cost is more for men. But almost universally the costs of the same item are more for women than for men. The running joke is that if you take the same volume of shaving cream, stick it in a taller narrower bottle, and add a label with purple and butterflies; you can slap a higher price on it.
Look at pockets. Women rarely find clothes with pockets. When they do the pockets are usually very inadequate. Their pants use less material but cost more.
Alternatively, their clothes often take more materials to clean, so drycleaners cost more for women's clothing. Haircuts cost more for women but they usually take more time and materials as well. So there are often hidden considerations that complicate how we judge and view this matter. At the end of the day it costs more if manufacturers can get away with charging more without losing sales.
I tuck. I have found that it is the most reliable for keeping it from drying. Mostly j noticed this with bags of chips. Then I adapted that to bread.