Agreed completely. So why, again, are you not a Catholic? (Particularly since you claim to support Holy Writ)
1 Tim. 2:5 For there is one God, and one mediator also between God and men, the man Christ Jesus,
Matthew 13:54 And coming to His home town He began teaching them in their synagogue, so that they became astonished, and said, "Where did this man get this wisdom, and these miraculous powers?
Matthew 13:55 "Is not this the carpenter's son? Is not His mother called Mary, and His brothers, James and Joseph and Simon and Judas?
Matthew 13:56 "And His sisters, are they not all with us? Where then did this man get all these things?"
First, the Bible says there is ONE mediator between God and man, the man Christ Jesus -- not the Pope, not Mary, not a priest.
Second, the doctrine that Mary had no other offspring is simply not true. The Greek language has specific words for brother, sister, cousin, etc. as do all languages. It clearly states he had brothers AND sisters (plural). Any other teaching is false doctrine. If in these two major tenets of catholicism they are in error, then they are in error about a LOT of things. No time to detail all of it.