Yes, terms can be co-opted outside of their origins. That's irrelevant to this discussion, my interlocutor takes the Quran to be revelation from God, as per Is

Yes, terms can be co-opted outside of their origins. That's irrelevant to this discussion, my interlocutor takes the Quran to be revelation from God, as per Islamic orthodoxy. That is, the vast majority of Sufis since the birth of Islam have been Sunni Muslims.