I'm suggesting that perhaps when you're in an unknown location that maybe some caution might be warranted. How did you know the maze wasn't full of traps or enchantments? I assume you would also drink anything put in front of you.

[ So yes. Linhardt is suggesting that Felix did this to himself. If Fraldarius doesn't want to be seen as stupid, then he shouldn't act in a stupid manner. ]

I was also assuming that you, like most people, would seek out the familiar in a distressing and unknown situation. Sylvain is the person here that you like the most. Assuming you actually like anyone - that was never clear to me.

[ He doesn't care whether Felix likes anyone or not. Linhardt doesn't know that much about Fraldarius: some information about his family from the archives as Linhardt pulled information about their Crest, his constant presence in the training yard when they were being educated (and his displeasure at Caspar's very...loud approach to his own training), and that Felix is the only other person Linhardt is aware of who shares his disdain for everybody's stupidity.

Hence why he's chiding the other man: He is supposed to be one of the less stupid ones. ]