Your question about Mary is based on a false premise. The Bible itself makes no claim that all spiritual truth is limited to scripture. The authority of apostolic tradition and apostolic authority is all over the place in the New Testament.
Everything about Mary is reasonable if you take the time to actually study what the Church teaches rather than anti-Catholic sources. If Mary was given the grace to be the holy mother of God incarnate, it is reasonable she could have been taken like Enoch.
Hebrews 11:5 By faith Enoch was translated that he should not see death; and was not found, because God had translated him: for before his translation he had this testimony, that he pleased God. KJV
You would love being a Catholic.
That’s wrong on so many levels I won’t even take up your time. The only reference is scripture to a “vicar” or “stand in for Christ” isn’t anything I want to be associated with. The only references by God to a “queen of heaven” tells me that Catholicism is something I will only condemn and speak out against.