Prateik with Dalai Lama

Actor Prateik Babbar, who battled substance abuse in 2013, opened up about his drug addiction like few do in Bollywood. He says he was marred by "guilt", which made him go public on his personal life. Celebrities have often accused media of prying in their personal lives. Why did Prateik choose to speak publicly about the part of his life which could have easily been brushed under the carpet?