I'm not saying God had to fight to retain power, as such. He knew another could fight for his power or to remove him from his position -and made certain it was not actually a possibility that any created being could overpower him.
Two thirds of the angels remained without sin/rebellion -though I'm not certain about honest mistakes/trial and error, etc. -not sure what it's really like to be one. Just going by the scriptures.
"Our world is a little worse than that. It isn't that we don't know about what is right. It is that we don't care, we do what is wrong even if it kills a billion lives in the womb, and call it progress. Or we build weapons to end all known life and claim we are enlightened..................."
The above was a quote from someone else -and I agreed.
As for the fast track and the long miserable journey.... if Adam and Eve had not sinned, they would not have been cast out of the garden -cut off from the tree of life, etc. -and if this had continued with all generations, we could have advanced much more quickly.
While God chooses which knowledge he shares, he is able to impart knowledge -even talents -without a human necessarily learning those things......
Exo 31:3 And I have filled him with the spirit of God, in wisdom, and in understanding, and in knowledge, and in all manner of workmanship,
Exo 31:4 To devise cunning works, to work in gold, and in silver, and in brass,
Exo 31:5 And in cutting of stones, to set them, and in carving of timber, to work in all manner of workmanship.