The technical term for what you've done here is "cherry-picking," selecting just the information which supports your position.
The map you're referring to, I assume, is the
one comparing the
predictions of experts favoring more restrictive or more permissive policies. It should be unsurprising that neither group believes that eliminating gun-free zones would influence the number of unintentional firearm deaths; why would it? The two groups differ strikingly in predictions about other effects of their elimination, such as on homicide rates, so it's not accurate to make the blanket statement that this shows that eliminating them "by their own admission leads to no increase risk to the public."
The point is that at present there are no data supporting or refuting the predictions made by either set of experts about this particular question.