Would it be honest for a pharmacist to give you a bottle of pills with no instructions? Pretty dangerous actually. The pills might do you great good, but if you take too many, not enough, at the wrong time, without food, or take it with an antagonist, it may be downright deadly.
For a priest to not teach what is prescribed by the Church, especially dogmatic teachings, is at best, negligent.
Any person may think He had literal brothers and sisters, but that is not the teaching of the Church.
One last thing, this and any other thread on Catholic dogma isn’t presenting a single new argument.
Instead, it is a trotting out of long since discredited arguments, misconceptions, and factual errors.
Does anybody think that the oldest organization in the world can be sustained if built on error? 2000 years is a long time for arguments to be made, studied, debated, and resolved.
Oh, and another thing, the Catholic Church and its human leader are recognized globally. The authority of the Church is well-known. Ask just about anybody who the head of the Church is, and the will say the Pope. Ask where he lives, they will say Rome (because they may not understand Vatican City).
The Catholic Church is one, holy, catholic and apostolic. It has been that way since founded by Jesus Himself. Argue all you wish, make any number of claims, but in the end, the fullness of Christian faith is held and taught by the Catholic Church.
Any person may think He had literal brothers and sisters, but that is not the teaching of the Church.
I see no place in the scripture which even hints that Mary had other children so I do not see any point in acting like it does by denying it unless some one asks.
It was common then and now to call step brothers :brothers.