Thanks for your explanation. I guess it's just a personal preference thing. Who knows, someday I might find it appealing.
Saying OneNote is just for handwriting or typing isn't even scratching the surface (no pun intended). I thinks it's Microsoft's most "killer app".
Aside from having as many notebooks as you like, each with sections, subsections and pages, you can move pages and sections around within notebooks or between them simply by dragging and dropping.
Aside from handwriting (inking) and typing, you can write in the on screen keyboard's (OSK) handwriting input panel and have text converted to type (although the past Win8 OSK version worked better for this), oh and hand written text, even in a picture will be attempted to have OCR in the background so that later it might be searchable.
You can move content from any source (pdf, web page, document, etc.) by either copy/paste, Send-to-OneNote app or in the case of other Microsoft apps you can drag and drop content. You can insert pictures and in MUI version you can take pictures and if you set it to take a white board picture it will correct the angle of view to be straight, adjust the contrast to be black and white and then attempted to do OCR in the background so that later the content might be searchable.
And as they say on TV "but wait", that's not all. Notebooks are stored in OneDrive. I make shopping lists at home on the computer and at the store open my iPhone's OneNote app to access the list. If you set a notebook to be shared, someone else (like my wife) can open it and I can add things from home and they're updated on the other person's screen in real time. You can have a notebook shared by people in a classroom or conference room. They can be next to you or across the world and they can see what you write, draw or drop into the page and they can annotate it and everyone can see what anyone is writing in real time.
And I didn't even mention the ink-to-math feature.
There are other similar apps out there (like Evernote) but if you're using a Surface and OneDrive and the Send-to-OneNote app, I think OneNote is the best. I just wish they'd (MS) do a better job keeping features between the MUI and desktop version consistent; hoping future updates will be better.