Do any of you remember how many times we change a baby during the day? Lots! And at night? Any time they (1) cry) and (2) any time they get fed. Ask the mom how often they get fed in the wee hours, all you husbands who slept through! So, what is the capacity-need, even in terms of the different scale? Babies pee anytime, adults "hold it", and need to. I will admit that more comes out of a baby then goes in. (hehehehehe)
What I'm saying is: just "converting" a factory line from baby to adult diapers might not be as easy as we wish, and has maybe considerable different criteria, though that seems counter-intuitive at first glance. That doesn't excuse a big company from designing properly for adults. And can we all afford to buy as many diapers as a baby uses in a day?
I'm not happy with adult pads and diapers, either. If enough of us switch to North Shore or another alternative, the big companies will do one of two things: make a better diaper, or buy out the alternative companies and not produce what they buy out. You guess which will happen.
Ford Motor Co. made 8,000 of the 16,000 B-24s (the most produced heavy bomber of WWII, and maybe ever). It wasn't as armored as the B17, not as sturdy, but had greater range and carried a heavier load of bombs. Made at the Willow Run plant, just outside of Detroit (then), staffed by a lot of Appalaichians and Southerners (who came for the jobs and the wages, and maybe the draft-exemption) who had to deal with a lot of Prejudice from those snob-Detroiters. The plant was built for the purpose, in record time. The photos of the assembly line are amazing. I think there's a video.
There was a company - west coast, I think - that competed (prior to the Pandemic) to make an affordable, smaller, and intuitive ventilator. They succeeded, but didn't have a big capacity, and were a small company with a small capital. They got bought out by one of the really big companies, who then proceeded to NOT produce them, as the profit margin on the expensive ones (like in the US Gov't stockpile) was so much higher. I got that from a reputable news source. Now ask why the Gov't didn't force someone to make that cheaper, more efficient, more easily operated design once the pandemic started....
Ain't politics and economics wonderful?