It's not that. [ Childe says almost immediately at the comment about looking bad in front of the enemy. ]

They're completely harmless at the moment since they're too busy letting the Regent pull their strings. Nevertheless, your mind is your own, and there's no value here for suffering through letting others see into it because that's when they start getting ideas. They start thinking they know you and how to control you one way or the other.

[ he doesn't outright say it, but he's worried about Matt's confidence being hit by others or them attempting to take advantage by manipulation regardless of side.

Childe's opinion is firm on the privacy of ones thoughts: No one should be allowed in anyone else's head. ]