I see.
Thank you for the clarification.
Then we are in agreement on the "gotta be in the Bible" doctrine, if not the validity of Sola Scriptura.
No quite, as the “gotta be in the Bible” is not dependent upon the premise that all that Jesus ever spoke or that is otherwise the Word of God is written, but that Scripture alone is the class of revelation that is the assured, supernaturally established word of God, upon substantiation by in word and in power the itinerant church began, and by which all is tested by.
And thus “gotta be in the Bible” requires it to be subject to verification by Scripture.
Many might hope brother John ‘heard” God tell him to give 25,000 to the church (or more weighty things), and maybe God did in His chosen way, but that does not have the authority of Scripture, though giving does.
Rome however, as with certain other religious groups, requires full assent of faith to even specific acts not in Scripture, not does assurance of the veracity of such depend upon the weight of Scriptural substantiation, and which source again, some claim only has authority by her, hers being directly from God, while an interpretation is only authoritative if by her, thus she is effectively autocratic.