Earlier quoted context omitted.
While nice in theory, it'll be bad for business for public swimming pools. Think of how many young kids are in the pool (under 3 years of age). Whether you like it or not, there's pee in the pool.
Most pools require toddlers and infants to wear special swim diapers that provide some type of barrier to prevent pee (and worse) from getting in the water. Not that they're foolproof, but if you are swimming in a pool that doesn't require this, I would get out. There are some really nasty diseases that come from human waste that I would not want to come in contact with.
Swim diapers are to prevent feces from getting in the pool, or at least greatly limit the quantity. They really don't do much of anything for urine, nor are they intended to. (An absorbent diaper in a pool would be useless and fail completely as it would become oversaturated.)