It was "Movie Night" down there on the beach so there were plenty of kids there at the time it happened. Maybe not many pictures (who takes pix of movie night?) but still there were plenty of kids there.
I'm not saying the parents made the right decision to let their 2-year-old play at the edge of the water. I'm saying it was a common decision that many other parents made too. It was considered "normal."
Just to put things into perspective...
Drowning is a leading cause of death for young children. "From 2005-2014, there were an average of 3,536 fatal unintentional drownings (non-boating related) annually in the United States — about ten deaths per day." "Among those 1-14, fatal drowning remains the second-leading cause of unintentional injury-related death behind motor vehicle crashes."
CDC says "Most young children who drowned in pools were last seen in the home, had been out of sight less than five minutes, and were in the care of one or both parents at the time." Were those parents irresponsible? Yeah, probably. Should have had a child-proof fence around the pool and taught the kid to swim, etc. But how many parents have taken their eyes off their young children for a few minutes here and there? MOST parents have. A lapse in judgement is bound to happen every now and then. It's more understandable when the lapse includes something many people think is "normal." Most parents deserve sympathy when tragedy hits, not condemnation.
Citations for drowning info:
http://www.cdc.gov/homeandrecreationalsafety/water-safety/waterinjuries-factsheet.html
http://www.cdc.gov/Features/dsSafeSwimmingPool/