There is possibly a "utility" in understanding evolution, rather than merely "believing" in it, though. And maybe this doesn't apply strictly to evolution, but rather to a better understanding of the scientific method.
People who don't understand how scientists have concluded the validity of evolution are easily swayed by those who say, "It's just a theory, therefore it's intellectually no different from creationism". They don't understand the weight that the term "theory" carries in the scientific world. And such people are, I think, the product of an educational system that either undervalues or devalues science education.
I remember being taught science by people who clearly didn't understand what they were teaching us, which often left them unable to answer difficult questions from students. I worry this is creating a kind of feedback loop: teachers don't see the value of science, so their students don't either. The students then grow into adults who believe science doesn't matter, so they think funding for education--not to mention research--should be cut. Because, hey, "it's all just a theory".