That isn't the point. Whatever faith tradition you belong to, you will argue from Scripture using the understanding that you now hold. When I was Pentecostal and then Baptist, I understood Scripture as I was taught to understand it; until something came along that convinced me that those understandings of Scripture was false. At that point I left.
Don't know how dedicated you were as a Catholic, and how much you knew, and I'm not going to ask that point; but if you were as dedicated to Catholicism as you are now, then at that point in your life, you read Scripture as a Catholic would read Scripture. Now you read Scripture through the lens of whatever faith tradition you belong to or has effected you.
As a Catholic the passages in question, have a few understandings; but one of those understandings is unequivocally speaking about the role of St. Peter. You as a non-Catholic cannot accept that understanding, because if you did, then that would be an issue on how you see the Church. Thus you require a different understanding, that matches your faith tradition.
My point being is that his thread in itself debunks any idea that people read Scripture in a vacuum. The far majority do not; and those few that do, usually walk away from the set of writings more confused than before they read it. Thus the Ethiopian needed Phillip.