I think the answer dwells in "Free Will" that exists in God, and the beings God created, and the understanding that Free Will is part of the perfection of God.
The bible story of GOD's interaction with mankind ENDS with the wedding of GOD to HIS creatures which is the base of my faith that this implies that this wedding is the purpose, the reason for, our creation. And no true marriage based upon love can exist if the Bride is forced to marry her husband but only if she freely and willingly chooses to wed him from an uncoerced love.
There can be no free will without choice, and the capacity to make a choice, in my view.
ImCo:
All FREE means is uncoerced:
IF GOD set it up so HIS new creation had no coercion or constraints upon their choices, forcing them to choose anything, they had a free will.
When we were created with a free will, our decisions free from coercion upon any choice we might make, then our free will is innate in us as well as in HIM...even before we were faced with a choice.
When GOD created the heavenly host, did HE demand faith and obedience the moment our eyes opened to our situation? I really don't think so. If Michael can be taken to symbolize the perfect spirit dedicated to holiness by his free will, and if Satan can be seen to be the most imperfect spirit against holiness by his free will, then we can also easily accept that the long time of our childhood in which we learn about life and our own desires is the way GOD also brought HIS new creation, Michael and Satan, to the choice to choose by faith, not proof, to accept HIM as their GOD or to repudiate HIS claims to be our GOD as the lies of a false god.
This is also the perfect setting for HIM to
proclaim HIS divinity, HIS gospel of election and salvation from all sin found only in HIS Son for all who would put their faith without proof in HIM to become HIS chosen, and for those who repudiated HIS divinity rejecting the gospel found in the Son, to become liable to come into HIS wrath, eternal damnation.
While I know that
Col 1:23 ...if indeed you continue in your faith, established and firm, not moved from the hope of the gospel you heard, which has been proclaimed to every creature under heaven, and of which I, Paul, have become a servant. can be interpreted in other ways, I believe that it depicts the heavenly proclamation given to every spirit in heaven for them to express their first free will decision about faith or rejection of HIM.
I also believe that the response to this proclamation separated all of creation into three groups: the holy elect, the eternally sinful reprobate and the sinful elect. The fall of some of the elect came about because some only accepted HIM so they could be free from the dangers of hell but were planning to then go their own way no matter what HE wanted from them, shrug.