I've only really been exposed to French in music, where I've sung various French pieces of the years. But from my experience, at least French is consistent? As-

I've only really been exposed to French in music, where I've sung various French pieces of the years. But from my experience, at least French is consistent? As-written is as-pronounced. Is this not really the case, and therefore is French also guilty of having the same vowels/consonants pronounced differently for completely arb reasons?