I’ve had professional life guard certification. If you have never attempted to rescue a swimmer, I assure you you’ve not the first idea of what a physically difficult, nearly exhausting task it is. For an untrained individual to make the attempt is life threatening. Ya don’t just jump in and rescue a guy, and ya don’t fault an untrained non professional for having the good sense to NOT make the attempt. We worked (and trained) with fins on, and it was still difficult.
That’s just the way it is.
Sorry for the double post.