I confess that I haven't read every word pertaining to the event. However, based on what is known/claimed:
A man who is very unstable on his stumps, responds to a perceived threat by choosing to risk moving across a slippery floor to confront a supposed intruder, who is presumably able-bodied and armed. He tells the woman he is so keen to protect to call the police.
Why not get down behind the bed with Reeva and protect them both with his great marksmanship? The intruder won't even know that they are there.
From behind the bed, Reeva can call security? They will surely get there much faster than the police. By the time police get there, all would have been played out.
Also, why does an affluent person who presumably moves around on his stumps at home have a floor that is too slippery to move around on safely?
BBM and has done so , without any mentioned injury for 6 years... ..