If it wasn't random chance that broke the enhancer, and you knew one enhancer broke exactly every 1600 shots, what's to stop you TTing (or on-selling) that enhancer after you've shot 1599 times?
I see now what you mean but I am not sure I agree. If memory serves me MA said average 1600 and I did not get the impression that it was going to be anything but random. As I said I have had enhancers that last many more shots than 1600 and other many less than 1600 but the average may well be 1600 I just don't like the way it is done.