Here we go with Protestant false dichotomy, the Christian religion is zero sum and one dimensional, if we say there is security in the flock, somehow, for some reason, this is an affront to Christ and his "all sufficient work" on the cross, blah, blah, blah.
The Church is the Body of Christ. Thus, to be in the "flock" is to be part of the body, and thus united with Christ. Because the Church is the Body of Christ, there is a connection between Christ's presence on earth and the Church. The Body of Christ mediates the presence of Christ in the world. Thus, the Church is a very necessary component in one's relationship with Christ.
Here we go again with the RCC false dichotomy, the RCC religion is zero sum and one dimensional. No one said that being together was an affront to Jesus but to make out there is salvation in the flock of the bad tree is false. Blah, Blah, Blah. Jesus is holy and your leaders aren't. Jesus taught the truth and your leaders don't. If any institution has a false dictonomy it is yours, Jesus cannot be involved in a bad tree. That is completely opposing entities, so your claim of being His church is false.
Your institution is not the body of Christ, no one wants to be part of your flock or part of your corrupted body. There is no unity with Jesus in your institution. Your leaders do not follow Jesus, Jesus had empathy they have prove they don't. Look at the way they have treated their victims throughout the centuries for a start. Jesus was a good shepherd, your leaders aren't they have harmed the sheep. I could go on about how Jesus is not to be found in your institution. It is one dimensional as it claims salvation is through the institution and it isn't.
The catechism 845 is incorrect:
845 To reunite all his children, scattered and led astray by sin, the Father willed to call the whole of humanity together into his Son's Church. The Church is the place where humanity must rediscover its unity and salvation. The Church is "the world reconciled." She is that bark which "in the full sail of the Lord's cross, by the breath of the Holy Spirit, navigates safely in this world." According to another image dear to the Church Fathers, she is prefigured by Noah's ark, which alone saves from the flood.334
"Outside the Church there is no salvation
It should read inside the RCC there is limited chance of salvation. It could be said that there is not a flock in the RCC but a pack.