There are, I assume, very few, if any , statistics about JWs dying because they refuse blood. So, as it was put by another poster, we are here on the terrain of opinions and conjectures. Is record kept of all the people throughout the world who died because of transfusions ? of course not, big companies involved in blood trade will see to it.
I'm not trying here to defend the WTS's stand on blood because it is evident that this stand has been motivated by the policy of calling the attention of the public opinion to JWs at all cost, and it has been modified over the years according to its legal consequences on the org's finances, because of the threat of prosecutions. I'm just pointing out that refusing blood transfusions happens to have been a protection for many a JW (and, as I heard it, many doctors too, they are not ignorant, those). Up to each one of us to infere, or not, that this God's command was not so bad after all.
On another side, Barbara Anderson has done a tremendous job in exposing the peadophilia problem, and its covering up within the WTS, that is to be put to her credit. As far as I know (may be wrong), I understand that it was this factor, not blood related qualms, which determined her leaving bethel and caused her DFing. Now, as an ex (de facto) JW, I wonder, do we have to ride any anti JW horse ?