Incompetent? You’re hired!
While at the beach, your safety rests in the hands of the on-duty lifeguard. The muscular man or woman is tasked with ensuring that nobody gets swept out in the ocean or eaten by a shark or something. Just watch Baywatch to see what lifeguards do other than run down the sandy beach in slow motion.
But here’s something you might not know about lifeguards. Many of them are unqualified for the job. Sure, there’s a screening process and a final exam, but according to the OP, half of those that passed didn’t the minimum standard. There aren’t enough applicants to be too picky about who passes and fails. Keep that in mind next time you take your family to the beach.