What if you have 500 pages which need to have font-bold replacing with font-italic? Or more? 1000 pages? Sure, you can probably write a script but if you name

What if you have 500 pages which need to have font-bold replacing with font-italic? Or more? 1000 pages? Sure, you can probably write a script but if you name your elements semantically, you potentially only have to change it once.