User blog comment:4Ferelden/A new interpretation of Starchild's motivation./@comment-184.145.16.186-20130723190813/@comment-5093119-20130724003143

If you asked Bioware, they'd probably respond with "Why not?" I thought it was obvious that Shepard, being injured and almost unconscious (hence his/her stupid comments), was interpreting the Catalyst's energy as the same child he/she had nightmares about, and its voice was the child's as well as Shepard's. I understand your frustration, because on many occasions in ME2 and ME3, the narrative fails to explain obvious things. But, it makes sense that Shepard would not question the Catalyst's appearance/voice because Shepard does not need an answer, because of his/her psychological state.