That doc lists only a few elements where aria-label should not be used: caption, code, definition, deletion, emphasis, generic, insertion, mark, paragraph, presentation, strong, subscript, suggestion, superscript, term, time
I am particularly concerned if people interpret the parent article to mean that aria-label shouldn't be used on certain semantic containers that are exposed in the accessibility tree by screen readers, such as <section> and <nav>.
I am particularly concerned if people interpret the parent article to mean that aria-label shouldn't be used on certain semantic containers that are exposed in the accessibility tree by screen readers, such as <section> and <nav>.