Baking from scratch is just one of those things where we make life way harder on ourselves for no real reason. Same deal with making your own pasta sauce when a jar tastes fine, or spending 3 hours on a homemade Halloween costume that a kid wears for 20 minutes. The end result is almost never as good as the effort suggests, but the person doing it feels like they have to prove something. Your daughter calling it the best cake ever is the only review that matters, and she would have said that about a box mix too.