Note, that the article's recommendation is wrong, we pretty much never need 3, as article suggests. We make lists for a reason, we want them to be easily distinguishable from the rest of the text. We don't want to disrupt the flow by confusing people when they read a next line and don't yet realize it's a list, because a bullet is not placed where they pay attention to. We want people to realize they are about to read a list and process it appropriately, not as a paragraph. Maybe they even want to skip it entirely for now and continue with the text below to avoid breaking context.