“If the Book of Timothy should be restricted TO Timothy because that is who the author was talking to...”
Naturally, Timothy applies to all of us. When Paul wrote, “4Recalling your tears, I long to see you, so that I may be filled with joy.”, we know he was talking to Timothy, not all believers or a Church organization - he wasn’t longing to see Mr Rogers, or the Baptist Church, but Timothy.
But when he says “All scripture is good for...”, it applies to everyone, not just Timothy. It is a general statement.
The promise of the Holy Spirit was made to individuals, not a church body. When Jesus said. “And I will ask the Father, and he will give you another Counselor to be with you forever— the Spirit of truth. The world cannot accept him, because it neither sees him nor knows him. But you know him, for he lives with you and will be in you.”, he is obviously talking to individuals who believe, not all individuals or a church organization.
There are a handful of scripture passages that are unclear, and need study and humility. The vast majority of it is easy to understand, if it is just read like any other book.
Yes, but it surely does not exclude their membership in an organization, does it? We have, however, other passages that urge doctrinal unity in the same group Jesus is speaking to. That would make them collectively, the Church.