ETA: I don't think pull ups are really helpful
I agree that if you've established that the child is capable of not peeing at night, or in the case of the child who's peeing after awakening, pull-ups don't do a thing to help the child make the connection about dryness. I would definitely agree that in a child who's wetting after awakening, or while still awake early in the night, something that lets them feel wet is exactly what's needed to start to make the connection and provide motivation.
However, in the case of a child who's a developmental bedwetter, making the child spend every night wet and uncomfortable seems unkind to me. Take my DD1, for instance-- she's 6. She fully understands that peeing in your pants makes them wet, and she hates to be wet. If she wakes up wet, she changes herself and her own pjs and sheets all by herself. However, she has no awareness of peeing-- she doesn't wake up until she's all cold and shivering-- sometimes twice in a night. She's not lacking in motivation-- she truly cannot help it. And when she wore cloth at night, she was constantly battling rashes. Twice she wound up with nasty vaginal yeast infections, from the wetness. And she deals with the interrupted sleep from having to strip her bed and change her pjs multiple times a night.
In those cases, I think that stay-dry disposable pants are a godsend. (And I'm the hugest advocate of cloth you'll ever met-- had three under three years old, all in cloth at the same time.) They contain leaks effectively, so a child's bedding and clothing stay dry. Even the biggest cloth bedwetting pants available will not hold a grade-school child's multiple pees. They help counteract embarrassment, especially in a child who really WANTS to be dry and just is not physically able. They allow older kids to handle their own wetting in overnight social situations. And they help guard against the effects on the skin from continual nighttime wetness.