Sometimes we face the pain of a situation in order to reduce the suffering present in it. A pain-free spirituality is impossible. As long as we are humans we will experience pain. Any spirituality which offers an escape from pain is offering an escape from our humanity and its responsibilities. This does not mean that we should accept or live with all pain.
Bad pain is bad pain.
To suggest that it is not bad is to close our eyes to social and personal evil. The pain of rape, of cancer, of malnutrition is wrong. To suggest that it is somehow good, some type of lemon from which the sufferers are to make lemonade, is to close our eyes to evil. To suggest that we accept these and similar pains as gifts from God is to make both God and the recipient into masochists. Bad pain, evil pain must be dealt with as we deal with any evil.