I suspect they’re not really arguing that we don’t use Sacred Scripture, but rather that we’re not respecting it as the sole authority in the life of the believer (which is a proposition refuted by Scripture itself).
Chapter & Verse please. This is the first I've heard this!
Does 2 Tim 3:16 not promote sola scriptura?
Sola Scriptura does not disallow other authority, but requires that all such submit to the Scriptures as the final logos authority, to which the Lord and his apostles themselves appealed, not a mortal man or men who presume that supremacy, and that according to their interpretation, only their interpretation can be right in any conflict.
Sola Scriptura requires that all authoritative teaching must be able to withstand the scrutiny of sound Scriptural exegesis, by which you will not find the perpetual virginity of Mary nor her as a Heavenly object of prayer, etc., supported. Nor even the Perpetuated Petrine papacy of Rome, from whence all this such flows.