The central moral feature of Iblis's story is his refusal of an explicit divine command, treating his alleged superiority and origin as grounds for disobedience. His arrogance displaced obedience.
Prior worship or residence among exalted beings does not guarantee a creature's eventual compliance. But this outcome cannot be transferred to angels as a species because the Qur'an explicitly identifies Iblis as a jinn.
The narrative is therefore read on two levels: resolving the linguistic and categorical objection and condemning arrogance before divine command. These are related but distinct lessons.