The Dali Lama states that there are good attachments. A good attachment might be anger towards a social injustice that can be used as fuel to help end the injustice. Once the injustice ends then that attachment may be released as well as the fuel associated with it The book by the Dali Lama - "Be Angry" - https://www.goodreads.com/book/show/43251460-be-angry