Did you happen to RTFA, in which the author specifically mentions HSTS preloading--helpfully styled as a bold, underlined, bright blue link--in the second parag

Did you happen to RTFA, in which the author specifically mentions HSTS preloading--helpfully styled as a bold, underlined, bright blue link--in the second paragraph? If you manage to then get to the third paragraph, a concise and compelling reason is given for why it's not applicable in the scenario the author is examining.