It is a pretty standard practice for lifeguards (and the district they work for) to not allow surfers, boats, and other non swimming activities within the "flags". the flags typically indicate the zone/area where lifeguards "patrol" and have responsibility.
So what's the point of having "Lifeguards" in an area where nobody is allowed in the water?
Why not instead have a "Launching/Landing zone" with Lifeguards to keep the little kids out?