I’m not sure that’s quite right. Even if miracles were unpredictable, they could be used precisely to break up our confidence in the more predictable, natural world. Miracles would point to a higher reality of supernature. That’s what Jesus’s resurrection is supposed to do for Christians, to prove that our mortality and politics (the strong dominating the weak) are illusions. Even if miracles hardly ever happened, they could serve as symbols for the absurdity of placing so much confidence in the humdrum, automated natural world. Of course, natural regularity is hardly so mundane (black holes, quantum mechanics, etc).