That's reasonable, but Jude never said he lived 1 Enoch--he just quoted a traditional prophecy of Enoch that happened to have been recorded in 1 Enoch. It's certainly fair game to investigate it, and to find value in it.
I think our difference is that I believe God certified, in his call to certain men, certain letters or books as worthy of keeping both for devotional and for instructional purposes, set apart as more critical than other works precisely because they represent foundational materials, upon which the Church was based. Christianity has been based upon the Law and the Abrahamic Covenant, as well as upon the teaching of Christ, as conveyed to us through those close enough to him to properly represent it. To me, that's what makes Scriptures "Scripture." It has its own intrinsic value, as opposed to other Christian works that also have great spiritual value.