Question RE: Links in Headers, Footers, Content, and Navigation

[3VE]

This question is regarding this Whiteboard Friday from October 2017 (https://moz.com/blog/links-headers-footers-navigation-impact-seo). Sorry that I am a little late to the party, but I wanted to see if someone could help out. So, in theory, if header links matter less than in-content links, and links lower on the page have their anchor text value stripped from them, is there any point of linking to an asset in the content that is also in the header other than for user experience (which I understand should be paramount)? Just want to be clear.Also, if in-content links are better than header links, than hypothetically an industry would want to find ways to organically link to landing pages rather than including that landing page in the header, no?  Again, this is just for a Google link equity perspective, not a user experience perspective, just trying to wrap my head around the lesson. links-headers-footers-navigation-impact-seo