A bigger question is what was that 'you'. Was it the ego? Was it my sense of self? We keep changing throughout our lives. But psychedelics are more than just a life changing experience. AFAIK, it's the only way to experience ego death. The dissolution of self can remind you of the transient nature of things and lead you towards spirituality. The good or bad aspect should be judged from that perspective rather than your perspective. The ego is temporary, but the spirit is not.