Yes. The basic requirement for salvation is faith is Jesus. That is basic. God doesn't expect those He uses to understand all his word for He to save them. No. If that were so, no single soul from WT will be saved because from day one, they had always had false doctrine, even now.
GB keep making that claim, "correct doctrine = salvation." But that's not true, even John the Baptist didn't understand all the scripture had to say about his work nor that of Christ.
Jesus Christ told the criminal at his right, that he will be with him in paradise. Why? His works, better understanding of bible? No. Just faith in Jesus.
Jesus also declared some sinners in his time as forgiving. It means that if God kingdom were to come at that time, those persons he forgave their sins will enter as righteous persons.
So since Jesus is the judge, you can't know whom he will allow into the kingdom. The Pharisees were so much attached to rules rules rules like the GB, shutting the kingdom of heaven, and disfellowshiping people because of their rules.
Even making complicated requirements for baptism. I mean, seriously? Did Jesus require long hours of study before people were baptized? I bet you that no army officer would ever be baptized today, but Cornelius was a high ranking military officer who got baptized. No need for days or months of return visits and bible study. what about the Jailer? And after the baptism, he didn't need hours of brainwashing, to wash off teachings of Judaism. Like WT would want to wash off Christendom teachings, some of which are even correct. Too over righteous to a fault. And God never even tell any of them divinely, that he has appointed them. I wonder how the Org would have been had they received a seconds of supernatural appearance!
No matter how bad Catholic or Eastern Orthodox had been, you do not have any right to establish your own church unless you were told divinely to do so (assuming they were the remaining link to the first church). You can choose to be bible students to study and learn God's word, but do not establish another religion. If God is tired, He will divinely appoint you. Then you have your authority. The Jews were very bad, but God didn't reject them. If any had formed another nation then, God won't approve it.
I mean, one need to be careful, and many churches are just like that. If one is tired, stay in your house, read your bible and practice it. Worship of God is in spirit and truth. Don't form a religion.