That's just a semantics issue. In reality a believer isn't all that different from someone you describe as 'understander'. I agree that a lot of people with too much faith tend to be quite ignorant when it comes to certain topics (both pro-science and pro-religion people actually ! ), but it's not like every 'understander' has a laboratory in his or her basement having confirmed lots of the scientific experiments.

In fact, the good stuff usually is largely as theoretical in nature as a good sci-fi novel would be when it comes to stuff surrounding the origin of everything. Of course the general scientific theories are a billion times more likely and plausible than a sci-fi novel could ever be, for all kinds of reasons, but faith is something funny when it comes to masses of people that blindly follow certain kinds of ideology.

In the end there is no wrong or right from the perspective of philosophy, let alone from the perspective of a certain lack of knowledge or the average quality of common knowledge. Having an actual true answer is something that's just too good to be true.