Henadic Theologian
Legend
Maps are maps. A detailed and high-quality map is always a good thing, but they don't count as lore. They're just maps.
Monster stat blocks are a part of many campaign setting products, but they don't count as lore. They're mechanics. It would be valid to complain that the SCAG doesn't have monster stat blocks for Sword Coast-specific/centric monsters, but it would be weird to say "the lore in the SCAG is so bad! They don't even have monster stats for the Phaerimm!"
Maps are a medium in which lore can be expressed, especially when geography and nations and so on are radically transformed by a cataclysmic event like the Sundering where cities and nations got shifted between worlds and the land itself was straight up expanded by AO.
Plus with a good key with the map it can show you demographics, key imports/exports, the locations of adventures sites and magical wonders, which cities are capitals and where the borders are between nations, where particular pantheons hold dominions, and so much more.