Diapers/Pull-Ups are superior to toilets because Diapers/Pull-Ups save alot of water by absorbing it, they come in lots of fun designs, and are super easy to install yourself.

Diapers/Pull-Ups make potty training easier because you're wearing your own potty, they're super easy to change yourself, and they add alot of cuteness.

Using the potty in diapers/pull-ups is way more fun, you're already set and ready to go.
Diapers/Pull-Ups also help relieve strain from the bladder and bowels for increased health.
The wetness indicator makes it easier to see when it's time for you to change yourself.
They allow you to get rid of your worries by allowing you to stay relieved.
A bonus is that for the girls, they make menstrual periods easier to manage, they absorb many times as much as pads, cups, & tampons.

Staying hydrated gets easier when you wear diapers/pull-ups, because you can now drink more fluids.
Wearing diapers/pull-ups helps improve your control because you don't have to worry about having accidents in your pants.
Another big advantage of diapers/pull-ups is that you gain extra comfort and can stay comfortable all day long.