Moody Monday: another autistic kid drowns

I've mentioned before (in point #3) the incredibly high rate of drowning deaths for autistic people, particularly children. I just saw the news that another kid has fallen to the fluid.

I have my own history with water, but I still can't tell you why this happens. Overwhelming whole-body tactile stimulation (audio stimulation is intense too, both below the surface and immediately above it) that distracts the brain so much that even autonomic survival instincts fail? Pathetic coordination/planning capabilities that make staying afloat into a difficult endurance test of executive function over body control? Intense stubbornness in deciding that "this swimming is stupid, and I refuse to do it any more", despite the consequences? Some combination of all three, or something entirely different?

I really don't know.