No, you misconstrue me. I use OneNote UWP exclusively. With "Read Mode" I meant I have OneNote open the whole day to access my knowledge base. Review pages I've stored for information. I am not constantly creating new pages, but reading old pages. Having those old pages editable always is counter-productive. If you went for coffee and your cat walks over your keyboard, you have accidental edits that you sometimes wont notice till next time you want to access that information. This beef has nothing to do with desktop or store version of OneNote, they are both subject to same problem.
OneNote is a database, not transactional database, but a freeform database none the less. In transactional database, you don't expose data for edits constantly. You have to press a button to add a new entry or update existing entry. The same should hold for OneNote.