Could you rephrase this? I'm interested in your point, but the use of 'one' as an ambiguous pronoun (and contrasted in one phrase with 'you') makes this super difficult to parse?
I think they're referring to transferring responsibility of thought/action to an "other" in the mind. I assume they were told to stop that style of habit because you don't usually see healthy things from that ("Not my fault, the voices told me to" or similar). Might be a cause of a condition or a symptom of trauma, etc.