Look at adult diapers. Shoot look at good nights. Diaper manufacturers realized there needed to be a pull up that could be worn at night that could be called anything but a diaper and even look design wise like a juvenile version of a toddler pull up. As far as adult diapers "disposable briefs" they are every year designed less and less like diapers. Shoot now a days its hard to find diapers, with most stores switching to pull ups or "disposable underwear". They are getting thinner and thinner and less reliable with each design change. Its a big self defeating circle with the manufacturers, media, and customers constantly working in concert to rid the market of what works the best. Adult diapers are designed to be concealed and hidden and to save one from the embarrassment of being discovered a baby.
I think the rare incontinent person like my self, who grows up wearing them ends up viewing diapers a lot differently than the majority of incontinent people who suffer it later on in life due to age, disease or accident. We have time to mature and build a thick skin as a shield from embarrassment.
Finally for those who are also fecal incontinent like me and have had a life time to get used to it, diapers are more about keeping your clothes clean as the diaper doesnt hide the byproduct of fecal matter. If you are fecal incontinent its less about hiding it and more about being as comfortable as possible. That is what I have discovered.
Incontinent people dont like diapers because society decided many years ago that they would be taboo except for babies. Only time can bring about a change in outlook and a maturation in views...