How do Christians justify not being catholic?

[Minimalist]

In 1 Cor 3, Paul says he did it.

10 According to the grace of God given to me, like a skilled master builder I laid a foundation, and someone else is building upon it. Let each one take care how he builds upon it. 11 For no one can lay a foundation other than that which is laid, which is Jesus Christ.

For that matter, Ephesians 2 -

19Consequently, you are no longer foreigners and strangers, but fellow citizens with God’s people and also members of his household, 20built on the foundation of the apostles and prophets, with Christ Jesus himself as the chief cornerstone. 21In him the whole building is joined together and rises to become a holy temple in the Lord. 22And in him you too are being built together to become a dwelling in which God lives by his Spirit.

Nothing special about "peter" there.


I do wish you people could get your story straight.