EAT is more about “off-site signals” not on-site. You are considered “authoritative” by others, and how they link to you. You could cover a topic exhaustively but if NOBODY links to it or nobody views you as an expert who write its, it’s not going to have any real impact for you. You should of course be writing posts that are complete, but no reason to write novels with regard to recipe posts and ABSOLUTELY always link-out and support any health claims.