Let me provide a counter argument: with the graph you can browse your notes visually in 2D, instead of just the usual list. You can just take notes as usual, easily add #tags and [[links]] in them, and then when you go to graph view you can see connections between those links and you can color code or filter tags. You get a global graph view of all your vault, and local view of any note. Links and tags are literally the core Obsidian features and the graph view sits on top of that. For me that is a coherent vision and utility.