It seems a bit unfair to label it a downside to just her cookbooks. At least in the US, it's only been recently that recipe providers have transitioned to weight based recipes, with folks like Kenji championing the transition.
Agreed, but this was normal in professional pastry cookery. I guess I agree with both of you. The purpose of using exact measurements is to ensure exact reproduction of the product. Not using bakers percentages when you can, takes away from that goal. However, if this had been done, far fewer people would have used the recipes.