Wearing diapers does not cause medical conditions. They do not affect your body in any kind of way. They don't cause permanent conditions. The only thing even remotely considered medical is diaper rash. Diaper rash can be caused by one diaper.
"Incontinence" would be a physical change in nature. Things such as catheters, surgery, injury, disease, or physical body modification, that would physically prevent someone from holding urine.
Wearing diapers 24/7 won't make one lose control, it's more of a comfort or acceptance. I could wear diapers 24/7, and not lose capacity, or I could release when I feel the first sign of a void. Whatever the case, you will still have control. Your muscle won't disappear, it will be weakened ever so slightly. Your mental training will be whatever you train it to be. After a period of 24/7 you might have to consciously pull your muscle closed that you're body usually subconsciously, does for you.
I can actually wear diapers for a period of time and have easier voids. I can wear underwear at anytime and have control. It's like when I wear diapers, I feel myself letting go subconsciously. I can wear underwear the same day and not let go. I've trained myself this way mentally. It's like when you travel on a long trip holding back a void pretty comfortably. You can feel the urge getting stronger but it's no issue. Then you get near a toilet and the urge is stronger but it feels like its about to burst the closer you get. This is an unrecognized mental comfort.
I know that some people with this lifestyle or fetish do perform self inflicted incontinence in physical ways. However wearing diapers do not cause a physical change in your control, it won't be permanent.
Like I said in a previous post, it's no different from being a toddler. A toddler going through potty training from wearing diapers. Toddlers are mentally comfortable with diapers, and they are trained to hold it and go to the toilet instead.
There's a benefit from Wearing diapers 24/7, or urinating more often, will help keep your kidneys clean. Reducing chances of kidney stones and prostate problems. My career of truck driving increases a person's risk of these issues and doctors and health insurance companies and truck companies know this and some actually encourage truck drivers to take supplements for urinary health. I've seen truck drivers with catheter bags and I often see catheters in open trash cans. Some drivers can probably hold over a liter of urine. Before I've started wearing diapers while driving, I noticed my urine being really smelly, cloudy, and have a thicker consistency. I only went to the restroom 2-3 times per day. My bladder capacity got to the point to where I could feel it moving around inside from being so heavy. It is a terrible habit developed by truck drivers.
Yes, diapers are able to benefit people healthily. Please stop making wearing diapers 24/7 seem dangerous or making people think it can cause permanent damage or loss of control, because it doesn't.