I don't think the article is even advocating for nested vs. not-nested inputs with labels, the author just picked nested to use in the example. The point of the

I don't think the article is even advocating for nested vs. not-nested inputs with labels, the author just picked nested to use in the example. The point of the example was to have a <label>. There's no reason to go to war over nested vs. not-nested. The only exceptions to "each input must have a label" are inputs of type "hidden" and ones that make button controls so the value attribute effectively labels the control.