Interesting thoughts, but Michael had the authority to do it. Why? What was going on that would involve Michael, and not Gabriel or one of the other unnamed archangels.
Where is Gabriel ever called an archangel? The only archangel I find mentioned in the Bible is Michael. The word "archangels" doesn't appear either.
The prefix "arch" seems to indicate someone in authority. Michael seems to be an angel who has authority over the other angels. I have found no evidence of their being a separate class of beings called archangels.