CB,
Since you have expressed that the Assumption is not based on the Bible, perhaps this will help you understand the Catholic Church teachings on this subject.
The Assumption in Divine Revelation
In addition to Genesis 3:15, there are several other Scripture passages that point to the Assumption of Our Lady. For example, there is Luke 1:28, since her bodily assumption is a natural consequence of her being “full of grace.” Other passages include Revelation 12:1, in which Mary’s coronation implies her bodily assumption, and 1 Corinthians 15:23 and Matthew 27:52-53, which support the possibility of a bodily assumption. And lastly there is Psalm 132:8, which provides: “Arise, O Lord, into your resting place: you and the ark which you have sanctified.” Mary is the new Ark of the Covenant, who physically bore the presence of God in her womb before bearing Christ to the world.
The Assumption is also witnessed by sacred Tradition. For example, St. Gregory of Tours (d. 593) wrote: “The Lord commanded the holy body [of Mary] to be borne on a cloud to Paradise where, reunited to its soul and exalting with the elect, it enjoys the everlasting bliss of eternity.” The doctrine was also explicitly taught by Church Fathers such as St. Germain of Constantinople, St. Andrew of Crete, and St. John Damascene.
We’ve heard all the arguments for it.
It still isn’t found in Scripture and just because Scripture doesn’t specifically say something didn’t happen doesn’t give anyone license to make it up and pass it off as truth.
There are a lot of things Mormons claim and they can use the same argument.
Does that mean they’re correct as well?