Earlier quoted context omitted.
Beyond a certain capacity the bladder is no longer contractile and must be catheterized to urinate. Happens every day in the OR or PACU.
Really? What happened before modern medicine? I'm not being snarky: I believe you.. but a burst bladder would be lethal without access to modern medical knowledge. That seems like a epic fail by evolution.
If we were intelligently designed, after all, I think God would call holding it for hours a "user error" and mark it "won't fix".