I have not said that "typological relationship means that Mary is/was a sinless ever-virgin". That sounds like a straw man invention of yours
I never said that "you" said that it what it means.
Here is what I said in my original reply
Catholics like to say that the Ark of the Covenant and Mary are link typo-logically. They do this to show the perpetual virginity of Mary and other Marian dogmas. Basically, because they are both "arks" and because if you touched the Ark of the Covenant you died then if Joseph would have touched Mary sexually he would have died or that Joseph would have not touched Mary sexually because she gave birth the Christ and didn't want to soil the vessel that carried the Christ.
The reason I said that is because just about every time I've had a discussion about Mary with Catholics (online or otherwise) they bring up that Mary is the Ark of the New Covenant and just like it forbidden to touch the First Ark and they point out Uzzah reaching out to brace the Ark and then falling over dead because he had not been instructed to touch the Ark. If it is a straw-man argument then it is one used by Catholics.
I also didn't say that this is the
only argument Catholics have concerning the various Marian Dogmas. But this thread isn't about those other arguments.
My argument is that even if Mary and the Ark are typologically related that it
isn't supportive of the Marian dogmas. You have to make assumptions about what being a "Type" means.
If you assume the type and ante-type have to share
all the same attributes then "Mary the Ark" does support the Marian Dogmas.
If you assume the type only points to or foreshadows the ante-type and they don't have so share all or even most of the same attributes but are linked in a specific and limited ways, then "Mary the Ark" does nothing to support the Marian Dogmas.
I have no problem saying that "Mary is the Ark of the New Covenant" as long as the second (I believe the correct) assumption is used.
Another problem with typology is that it is very subjective.
For instance, I could logically say that the Ark/Tabernacle was a type of "Christian". After all, the Spirit of God dwelled in the Tabernacle and now the Spirit of God indwells all true believers. In a typological sense, all who are "in Christ" are Arks of the New Covenant. Christ abides in us and we in Him.