snowberryZ, I understand your concerns, but the explanation that immediately sprung to my mind is that the pants had been redesigned to cope with growing obesity in women and the need for underwear to be pulled up over rotund tummies, in the same way that pants are designed to go over buttocks.
Some 20 years I was caring for a recently widowed uncle. He was in a state bcause he was going into hospital and for the previous 10 years his wife had been buying him women's stretch briefs. Nothing kinky. He had a phobia about clothes touching him, all his clothes were sizes too big, even his shoes. His trousers were kept up by braces as he could not bear the feel of a belt and he hated the elastic hold of Yfronts and boxer shorts. So my aunt, having no knowledge of mens slips, bought him womens briefs. I bought him men's slips and he wore those for the rest of his life.
Anyway male transvestites have always worn womens clothing and underwear and wasn't there a thread this week complaining that the gusset on women's swimming costumes were getting so narrow, no decent and respectable older women could be seen swimming in one.
So snowberry I understand your concerns, but there is more than one possible explanation for the phenomena you mention and with others, I would suggest you just buy a different brand.