CC.
That is the bottom line in my view...cost...the overall statistics suggest that any increased safety of one over the other is really to vague to actually quantify with any certainty. That is a shame because it should be a no brainer...I guess the no brainers are to blame.
Dead right and in fact some years ago Mac Job the well known flight safety aviation writer made exactly the same point as you have - that is light twin engine safety is tied to cost.