Then by the same authority that you decide to believe what you believe.
Everyone has to decide form themselves what they believe and in every case it becomes each person's own personal interpretation of Scripture.
The fact that Catholics have decided to throw in their lot with the pre-packaged teachings of Catholicism makes it no less their own personal interpretation of Scripture than anyone else's.
Whether you work through it on your own or just accept some else's work, the individual at some point, needs to decide that that interpretation is correct and accept it.
It is therefore, a PERSONAL decision on the part of each and every person. The fact that it happens to agree with other's interpretations does not negate the fact that individually, each person has decided on their own, what they are going to believe, what they are going to accept as truth.
So CB and I and a whole bunch of others, throw in out lot with Scripture under the leading and guidance of the Holy Spirit. Others accept church teachings in lieu of that.
Not every case! There are those of us Catholics who follow the Magisterium that is, teaching authority, of the Church. I choose to be Catholic.
What I read here are impositions of others' self-interpreted beliefs in a forum about the Catholic Church which takes the original topic off-track!