Kids should wear diapers for bed wetting.
Bed wetting occurs in many kids and even teens and diapers make sleeping much more comfortable and also keep the kids and teens clothes and bed dry from wetting the bed.
It's worse to wake up in a soaking wet bed, when a diaper can help contain the pee and help the kid or teen get a good nights sleep.
Some kids who wet the bed may need to wear regular tape on diapers, like Luvs, Pampers, Huggies, Parents choice size 8 diapers etc.
And some kids may only need to wear bed wetting pull ups like Goodnites bed wetting pull ups or even regular pull ups if they fit into them.
Diapers don't make bed wetting worse, as bed wetting is not something a child can control and eventually they will outgrow it, but until the child outgrows bed wetting, it's best for the child to wear diapers.
Here's a link to a video of a 7 year old boy wearing Luvs diapers and they fit him just fine.
Some kids also need to wear diapers all the time for autism, incontinence etc and some kids just love to wear diapers and that is okay as well.
7 year old boy Nathan wearing Luvs diapers