Alice, that is a very interesting theory. It should not happen, of course, the captain should have made that decision to go around and activated it immediately. But it could "fit". Because of the very high descent rate it is possible to view the few seconds delay as critical. In other words, indecision rather than deliberate risk taking, and perhaps lack of awareness of the significance of their descent rate. I suspect it is another question to which we may never have final answers.