The point was that most streamers have zero programming knowledge and want simple straightforward things. They do not want lengthy tutorials on how to use an extension. From my own experience they often don’t even understand or know about Twitch API, so the fact that they have to create a reward first before being able to edit it through the extension just complicates things too much to implement it in the first place.
Unless you want to volunteer to answer 100 questions a day, “Why is it not working for me?”.