The Roman Catholic needs to answer how can they believe that going through Mary is NECESSARY for salvation when Scripture makes it clear it is only through Christ that a person is saved.
This is but one of many questions for the Roman Catholic.
You can’t or will not answer the questions, so you punt.
You can always look up why the Catholic Church respects the Blessed Mother as the first and most Holy Saint that is closest to Jesus.
If one is truly close to Jesus, then it should be easy to understand why we are close to the Blessed Mother and ask for her prayers and intercessions.
Discredited? Really?
Google “Christian Churches near me” and wait for the results.