Well, it's not that looking at one is wrong, they've got the mechanics like Wapourif to maintain them after all, it's the whole 'deliberately taking them apart to look at each individual piece like any other machine' that is distinctly un-sacred. The Simulacrum Theocracy has built up this notion of sacred and holy that makes them better and more deserving of the power of the Simoun, and more and more the war is exposing the hypocrisy of it all.