The world is not this black and white. This assumes the customer actually knows all of the pros and cons of available options and is able to take the time to make a decision that best aligns with their values. In practice (at least in the US) we have and infrastructure that makes it practically impossible for many people to live their lives without a car, and purchasing decisions are based almost exclusively on marketing materials and social forces.

> Obsidian is not open source, but you can gauge what they track in their privacy policy

A privacy policy is a pinkie promise. Why depend on something so fragile for such an important function in your life, when there are much more trustworthy options? Logseq, Org Roam, and Joplin immediately come to mind.