Just read about how Wild Bill Hickok used to go out every day and empty his Navy revolvers in practice, then clean and reload them so he’d be carrying fresh charges. Cap and ball guns were probably more reliable than early cartridge revolvers when properly maintained, especially the rimfire ones.
Cap & Ball revolvers are high maintenance. They require a good deal of lubrication, and if you're going to keep them loaded for long periods of time, you have the "worry" of if that lubrication has managed to find its way into the chambers...because it happens. So since Wild Bill was in the gunfighting business, and every day is certainly overkill; it probably did give him peace of mind knowing that of all the problems he may encounter, THAT won't be one of them.
