Because my work notes are personal as far as I'm concerned. If my employer was telling everyone to use Obsidian that would be a different story. Their scope is too wide, and yes, it's frustrating. Not to mention, the core obsidian application is lackluster at best; it's the plugins that really make it stand out. How much of the money goes to plugin creators?
Just scummy all around.
A vast majority don't care how any individual uses them. They put collaboration features behind a paywall, but they also host the data. I liked the idea of hosting my files myself, which is what makes this all the more ridiculous. What extra cost does Obsidian incur whether I take a note about a book I read or I take a note about a meeting I was in?