I live in the sticks and have never been near a subway or a platform, and I mean no disrespect to the victim here.
But it appears to me that he is standing next to the chest-high platform. Am I seeing it wrong—is it possible that he is not standing but rather dangling?—or is it really the case that he is unable to pull himself up over a four-and-a-half-foot ledge?
Is the surface possibly very slippery? Or perhaps it happened in a split-second? The still photo makes it look like he is standing and contemplating his fate.
Fear will often freeze people. Also, he was 58, and it would take quite a bit of upper arm strength to pull yourself out, assuming there were no grippy surfaces for the hands or feet.
It’s easy enough to avoid getting hit if one is not paralyzed in fear and has at least a couple of seconds to move.