Even without kids...I'd want a swimmable pool should the mood strike. I guess they're thinking of it being a social lounge pool setup so the grill master / bartender isn't too far from everyone?
The story goes that it became a bit of an unwanted tourist attraction in what was previously a quiet exclusive neighbourhood. Apparently Webb had a " if you've got it, flaunt it" attitude. Looking back, I bought a couple of his LPs so I helped pay for it !!