I would guess that they know most Catholics don't own a Bible to check and call them on their lie...And those that do own Bibles are convinced that they (and especially we) couldn't possibly understand the plain speech of the scriptures...
Clearly someone claiming to be Catholic doesn’t mean they even understand what Catholic teaching is. That seems to be the case here when I ask simple questions and get the typical responses I do.
As for reliance on the Scriptures....well, we’ve seen in these last few posts where that goes....the use of Phil. being applied to Mary!