It's quite possible, X would admit, that he's being stupid. He just happens to believe that doesn't mean he's wrong.

"No, you can't leave without telling anyone where you're going."

He doesn't mention the physical changes, obvious though they are. That's a problem for when they avert the more immediate reckless decision. About the only person X has met who does better in isolation during personal crises is Valdis; and even then, he'd argue that the right kind of support is better than no support at all.