"And you shall call his name Jesus, and He save his people from their sins" Matthew 1
The real, eternal name of G-d is Jesus, or perhaps some 1st-century Hebrew or Aramaic variant thereof. The point is, the very N-me of G-d means, "He who saves from sins". The N-me of G-d is eternal and cannot change. The fact that a saving deity exists makes it inevitable that somebody, somewhere will sin and will require saving. So yes, the Fall was inevitable.
But is that bad? Consider the contrapositive: if sin never happened, then, logically, G-d as we know Him would not exist.
What if Job was never tested? His faith would have never been proven. And likewise, G-d's love would have never been proven if Jesus had not been sacrificed, a la Abraham and Isaac at the mountain.
What if Adam and Even had never sinned? Your life would be a lot easier, certainly, and you could easily improve yourself and let go of irresponsible and bad habits without difficulty. More significantly, you would be surrounded by perfect, idyllic, flawless people. You would never be able to bless those who curse you, because nobody would curse you. You would not be able to love your enemies, because you would have no enemies. Consequently, you would not be able to reflect the glory of G-d in the way He intended. The creation of the universe, and the creation of man, would have ultimately been a fruitless endeavor.
But G-d didn't create you for that.
Just as it was necessary for Job, and Abraham, to be tested, it was necessary for G-d H-mself to be tested. Jesus was tempted as we are, and never sinned. He was not simply tempted by the devil in the wilderness, but he was tested every day of His Life. I will love my enemies. I will share the truth. I will be willing to lay down my life. Not my will, but Yours be done.
"All who dwell on the earth will worship the beast, whose names are not written in the Lamb's book of life, the Lamb who was slain before the foundation of the world." Rev 13:8