Kidney stones fucking suck too. Note that there are more than just the calcium oxalate kidney stones, but for those ones in particular, other things high in oxalates that you might be eating that are high in oxalates: spinach, chocolate, tea, nuts, sweet potatoes.
So if you're trying to eat healthier, don't fully adjust to eating (breakfast) an oatmeal bake with nuts, peanut butter, and chocolate; (lunch) wraps using a spinach wrap and/or spinach instead of lettuce for the greens in it; and tea instead sodas... Unless you like the idea of Tylenol sized kidney stones.