I'm one of them. Had botox injected into my sphincter to weaken it, but it "froze" my sphincter in a tightly closed position. I also had another botox injection into my bladder wall to stop ot from spasming, but it completely stopped my bladder from contracting normally. Both times I had to be catheterized for 3 months till it wore off.
Also, botox is temporary. It will not cause permanent changes when injected into muscle. AND your body builds up a resistance every time it's used. So ot becomes less effective the more it's used. Botox is a bandaid at best. If you want real results then seek a different method.
Sadly I'm not a bedwetter, but on the positive side, I don't have to change diaper before bed so I often go to bed soaked.
Leaked a little when I peed when I woke up, because diaper is soaked. Not changed yet, there is more capacity in the rear.