It's interesting to see how many occult and metaphysical groups appeal to the book of Enoch.
Tens of thousands of books have been written by occult and metaphysical groups and individuals who appealed to the Bible. According to your logic, we should therefore burn our Bibles as being the source of occult and metaphysical teachings!
The article that you posted from the Internet was obviously not written by a scholar of the Pseudepigrapha of the Old Testament, but by some quack. If you want a scholar’s opinion, I suggest you consult the
Apocrypha and Pseudepigrapha of the Old Testament by R. H. Charles, D.Litt., D.D., Fellow of Merton College, Oxford; Fellow of the British Academy. Volume II of this work, all 871 pages of it, is devoted to the Pseudepigrapha of the Old Testament. In this volume you will learn that R. H. Charles wrote concerning the Book of Enoch, “The citations of Enoch by the Testaments of the Twelve Patriarchs and by the Book of Jubilees shows that at the close of the second century B.C., and during the first century B.C., this book was regarded in certain circles as inspired. When we come down to the first century A.D., we find that it is recognized as Scripture by Jude.” It is also quoted as Scripture in the Epistle of Barnabas xvi. 5, and is quoted as Scripture by Athenagoras, Clement of Alexandria, Irenaeus, Tertullian, and Zosimus of Panopolis.
R. H. Charles also provides information concerning the 29 ancient manuscripts of the Book of Enoch with which he was familiar.