This is something I have been wondering. I pictured both parents being incontinent and they decide to have kids. So they have a baby but because both parents are incontinent, none of them won't be using the toilet so their child won't be seeing it. He be seeing that both his parents wear and will think wearing diapers is normal, even if they had kept it hidden from him, he still wouldn't see them using the toilet. But I find it very darn difficult to keep it hidden. Do you think it be difficult for the parents to toilet train their child and to get him to understand why he should use the potty? Would be be potty trained late because eventually he will figure out other people use the toilet because kids at his school would be and he will eventually discover his friends arne't wearing a diaper.
I can imagine it must be pretty difficult for both incontinent parents to potty train their child because mommy and daddy both wear them. Toddler hood is at an age where they watch you and observe what you do and copy you so if you are both wearing diapers, they are going to think that is normal. But yet if you have other kids living in the house who are potty trained, they will see that wearing diapers isn't a normal thing and not everyone wears them. In fact they may think only mommy and daddies wear them and so do babies and big kids do not.
I also wonder if it's still possible for a child to be potty trained on time despite having both parents in diapers. Some kids don't like wearing them so it may not be a problem for the parents to potty train them. Sometimes explaining to them why they both wear and why he should learn to use the potty and not wear diapers anymore, bam they understand and get potty trained. It's no different than explaining why some people wear glasses or use a wheelchair or a cane or crutches or a scooter or why some people need shots and need to be poked with needles (diabetes).
If both parents wore them but they weren't 100% incontinent or they still have bowel continence, then their kid be seeing them using the potty but they would think wearing diapers was normal so I can imagine the kid may would want to learn to use the potty but not want to give up diapers unless they happened to like their big boy underwear because of what's on them and the only way they can have them is if they keep them dry. That is a way to get them to keep using the potty and not have accidents.