Hi Melinda, good question.
I see it like this — Revelation 18:4 says "Get out of her, my people, if you do not want to share with her in her sins."
If God says MY PEOPLE are still INSIDE her, then she can't be God's organization. God's organization can't be Babylon. His people are inside Babylon and are told to get out.
Who is Babylon? Revelation 17:5 says "Babylon the Great, the mother of the harlots." She is the world empire of false religion — not just one church, but ALL religion that commits spiritual fornication with the kings of the earth for power and money — James 4:4
That includes Christendom, and that includes WT too, because WT was never Jehovah's org to begin with. As I menti9ned yesterday to Nomex. Paul said the mystery of lawlessness was already at work in his day — 2 Thess 2:7, Acts 20:30 — long before WT existed. So the apostasy started in the first century, not with WT falling away.
So who are MY PEOPLE? They are individuals, not an organization. Matthew 7:21 "Not everyone saying to me Lord, Lord will enter the Kingdom, but only the one doing the will of my Father."
They are honest hearted ones scattered throughout all the churches — Catholic, Protestant, JW, Adventist — who love God but are trapped in false teaching. God is calling them out individually — 2 Cor 6:17 "Get out from among them and separate yourselves."
That is why I don't believe it's just WT that became apostate. It's all of them. That's why Dave said what he said — it's a bold statement to assume God's org on earth is the Watchtower. It's an opinion, not what the Bible says. God's temple today is people — 1 Cor 3:16 "you yourselves are God's temple."
His people have to come out of ALL OF IT!