Some good insights here:
“In Dutch Reformed circles, relinquishing the sola Scriptura of the Great Reformation was one of the key reasons why the confessions came to be under attack during the nineteenth and twentieth centuries. The course of history has made clear that those who challenge the position of the confession may well be seeking an escape from the assertions of Holy and Divine Scriptures itself [sic]. In short, a vague notion of divine revelation has as a direct consequence the weakening of the authority of ecclesiastical confessional documents.”
R.C. Janssen, “By This Our Subscription,” 279.