All Scripture is profitable for us, and we can learn from all Scripture. But all Scripture is not addressed directly to us. In other words, all Scripture is for us, but all Scripture is not about us.
2 Timothy 3
16 All Scripture is inspired by God and is profitable for teaching, for proof, for instruction in righteousness.
17 That the man of God may be thoroughly equipped for all good works.
Romans 15
4 For whatever was written aforetime was written for our learning, that through endurance and the encouragement of the Scriptures we might have hope.
The Twelve
Jesus and the Twelve were Jews. They were from Israel and addressed their words directly to Israel. So too did the apostles of the Twelve, whose letters we find in Scripture:
James 1
1 James, a bondservant of God and of the Lord Jesus Christ, to the twelve tribes scattered abroad (Greek: diaspora): Rejoice!
1 Peter 1
1 Peter, an apostle of Jesus Christ, to the chosen ones of the scattered abroad (Greek: diaspora) in Pontus, Galatia, Cappadocia, Asia, and Bithynia.
Their letters contain words addressed to the twelve tribes and to those scattered abroad—Jews scattered among the nations (Deut. 29:28-29). After all, the twelve disciples were sent to the house of Israel, as we saw earlier in Matthew 10:6.
In the book of Acts you read that Peter, as spokesman for the Twelve, addresses the people of Israel (2:14,22,36; 3:12; 4:8; 5:29-31).