A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Your logic is OK & is generally followed. Most of what is on the Ribbon is specific to the current workbook/worksheet & its content. However, the design emphasis has drifted heavily toward discoverability & in-your-face availability. The only explanation I can offer is that Microsoft has determined that a few Preferences are more frequently changed so they have incorporated them on the Ribbon for convenience. I'm not aware of any documentation.