Why? The suggestion bar doesn’t obstruct typing or reading, it expedites access to spell check and emojis, and if you really hate it, you can disable it.
As another commenter has suggested, you can get it out of your way if you take the time and energy to do so. It just requires that you put in effort rather than have it handed to you on a silver platter.
Well thankfully there’s both settings to turn those features off and settings to customize your own text replacement built right into the OS. So yeah, the users can indeed decide what they want to say/do.