Yeah thing is, it really looks like everyone outside of comics fans think the idea of a Batman who just.....kind of....avoids being shot is even more ludicrous.
And I think there's an association of Spandex Batman with Batman 66, Adam West and a bunch of other things that a Director of a kick-ass Batman franchise wants no part of.
Even Nolan's Batman, who went around throwing those Ninja Smoke Bombs, had to be able to tank bullets to be any use.
But I have to say Reeve's Batman tanking machine gun fire is way less crazy than Snyder's Batman tanking at least one bullet to the cowl and I don't remember anyone complaining about that.