The Book of Enoch provides some information which is essential to salvation, such as the nature of the pre-existence of the Christ and the nature of the mortal sin of sorcery.
This leads to two conclusions:
Firstly if you want to stop people being saved, suppress the Book of Enoch.
Secondly it is almost essential to salvation to prove the veracity of the Book of Enoch. (‘Almost’ essential because there are direct revelations and miracles from Christ Himself through the Holy Spirit which can substitute for the book.)
