Why did Allah create humans and jinn to worship Him, despite the existence of angels who never cease to glorify and worship Him, and why does Allah create anything when He is the All-Sufficient?

It has been previously explained that the wisdom behind creating humans and jinn—despite Allah being self-sufficient and having no need of them—is to test them and examine which of them will worship Allah alone and obey Him. Furthermore, when the angels assumed that the existence of those who glorify Allah and obey Him was preferable to the existence of those who disobey Him, Allah Almighty answered them by stating that He knows of wisdoms and benefits in creating this type of being that the angels do not know.