The main purpose is not to store the notes, but to create a way to easily hand the note as a piece of paper. Ideal scenarios of use: you want to remain silent, you want to be discreet, you can't talk, etc.
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Notes Alternatives
Notes is described as 'Use Notes to capture a quick thought, create checklists, sketch ideas, and more. And with iCloud, you can keep your notes up to date across all your devices' and is a Note-taking tool in the office & productivity category. There are more than 100 alternatives to Notes for a variety of platforms, including Mac, iPhone, Windows, Android and iPad apps. The best Notes alternative is Joplin, which is both free and Open Source. Other great apps like Notes are Notesnook, Microsoft OneNote, Zim and CherryTree.