Canons are like what Jesus condemned. They substitute the traditions of men for the law of God.
I'm not a protest-ant; I'm a believer in The Word.
The canon in the sense I used the word refers to the list of books considered Scripture. It's rather difficult to believe in the Word without knowing which texts attest to Him faithfully.
Of course, perhaps you have grace like St. Mary of Egypt after her repentence and know the content of the Scriptures without having read them, in which case, indeed canons of Scripture are not useful to you.