Question for the experts - If the child was not in the water and playing in the sand, would the gator come out of the water to grab the child? Or only because the child's legs were in the water, the gator attached? I have certainly seen gators come out of the water. I am just not sure if it is to eat.
I'm not an expert in an academic sense, however, I am a native Floridian who has spent countless hours on our freshwater lakes, and my brother has been a professional fishing guide in central Florida for over 20 years.
I can confirm and reiterate what others have stated upthread. In the wild, alligators want nothing to do with humans. They will submerge and rapidly move toward cover as you approach them if in open water, and if already entrenched in significant vegetation for cover, they often make an explosive move further into the shoreline.
In response to your specific question, and assuming that hypothetically this animal had been fed, desensitized, and no longer had a fear of humans, unfortunately, all bets are off. I've witnessed animals in this state approach boats, and walk up on shorelines near residences in broad daylight while displaying aggressive and confrontational behavior which is nothing short of a wholesale departure from the norm.
With a sufficiently motivated and desensitized animal, sadly, I doubt a matter of inches would have made a significant difference, although as a reasoning engine, I'm sure the alligators brain was processing a number of pieces of data. Sadly, in this case, the sum of conditions resulted in an attack.
The value of preventing wildlife from from being fed really cannot be overstated.
I join the rest of our WDWMagic family in grief, and in the sending of prayers, light, and love to all involved.
I also share my sincere hopes that this thread will remain civil, and respectful. We are part of a great community here, please join together in demonstrating this quality in the hours and days ahead.