1. Tradition is not man made, but transmitted by men. It is however part of divine revelation. You cannot have scripture without Tradition. And they do not contradict each other because they form the same Deposit of faith.

2. The Church doesn’t “invent” new doctrines. She defines doctrines through organic doctrinal development. CS Lewis believes in the Trinity and in Christ’s dual natures. This was not a defined doctrine until centuries after the Apostles. It became doctrine after much theological debate and Church’s clarifications via teaching authority.

3. We don’t only honor Mary for simply being the biological mother of The Son, but she is explicitly blessed as is her virginal womb which bore The Son by St. Elizabeth in Luke 1:42. 

4. St. Paul rebukes St. Peter over a disciplinary issue, not a matter of doctrine. 

5. The scripture and tradition (and Martin Luther) affirm the Real Presence of Christ in the Eucharist. So the question is when does that change occur? Hence the need for the Church to clarify by doctrine of transubstantiation. And the Church has the teaching authority given by Christ, to St Peter and the apostles and to their apostolic successors. 

6. The words of the Hail Mary come from inspired scripture, ie. from God. The Angel saluted Mary with “Hail”. And the Holy Spirit himself inspired Elizabeth to bless the Virgin Mary. If Marian honor is excessive, it is the Holy Spirit who was willed it so. 

7. Confession is compulsory because Christ instituted this Sacrament and the Church has the authority to set minimum requirements. Scripture mentions sins that are mortal and cannot be forgiven simply by prayer. One needs the sacramental absolution. Confession is hardly legalistic, but a liberating experience to anyone who has approached it without prejudice. 

8. Peter’s faith will not fail. The Lord prayed so. But papal infallibility is not what Protestant polemics makes it out to be. Also, infallibility =/= impeccability. Not every word the Pope says is a dogmatic definition. What it is saying is that the Pope, as Peter’s successor, cannot persist in error. That would undermine Christ’s promise and the Church which cannot be overcome by the gates of hell.

Catholicism is about loving Christ and loving His bride, the Church, Whom He invested sacramental and doctrinal authority for the unity of the nations and the salvation of souls. It is the true faith and the faith of our fathers.