Advanced link analysis includes differentiating between sections of pages and treating links differently. What makes you think G or other engines treat links in the editorial section and comments section of the webpages the same as each other. Especially for those content management systems that are widely in use like wordpress, joomla, etc. The advice here is helpful and has nothing to do with creating a nightmare. All those who are asking questions here and envision a nightmare would agree that links in the footer section are treated differently. How is that possible if sections on a page are not classified and treated differently.
It is increasingly advantageous for companies to use social media platforms to connect with their customers and create these dialogues and discussions. The potential reach of social media is indicated by the fact that in 2015, each month the Facebook app had more than 126 million average unique users and YouTube had over 97 million average unique users.
While ordinary users were not that interested in pages' scores, SEOs of a different caliber felt that this was a great opportunity to make a difference for their customers. This obsession of SEOs with PageRank made everyone feel that this ranking signal is more or less the only important one. In spite of the fact that pages with a lower PR score can beat those with a higher score! What did we receive then, as a result?