I have not tried hypnosis and doubt I am the kind of person who responds to it much but I know both professionals who use it and clients that apparently benefited. It definitely does not erase memories. I don't think there is anything healthy that would erase memories, only brain damage, dementia or some serious forms of mental illness. Especially the kinds of memories you want to get rid of. I think time is what can change it and maybe engaging in things that take your mind off, but I doubt the memories will ever vanish as long as your brain is intact. I would not wish for amnesia either - many people who have it would give anything to be cured from it, it is not a good experience.