User blog comment:The Milkman/Indoctrination Theorists Say the Darndest Things, Part II/@comment-5830255-20121205091100/@comment-5830255-20121205212231

Except mental degradation could be considered superior, you can recover a leviathan thrall from their control, as seen when we use this fact to somewhat safely obtain the Leviathan's location. Recover an indoctinated subject and their doomed, you will never get them back. So it was likely intentional and all the more perfect.

Even if it's telepathic it's all in Shepard's head anyways, which is why it never made sense on Milkman's behalf to mention communication. Even if that was communication it was still inside Shepard's head using his memories and ergo "mind-world" lol