"Like talking to people who've been here longer than half an hour," Katsuki suggests and rolls his eyes. He still wants to take down whoever put them in that shirt, possibly more than finding the survival supplies. When there's a direct threat, it's best to deal with the threat. Survival later. There aren't many clues to go on for the shirt either. Still, it seems likely someone either set a trap that they triggered or that they were there, within eyesight, hearing, or otherwise able to notice them.

"Lets go check for who did this," Katsuki says, "We might find stuff we're looking for while we do that, but we want to make sure no one else is in danger. It's fine if they target us, we can handle it, but if they're targeting other people? They could be in real danger."

No, Katsuki isn't commenting on the useless wings. He's pretty sure what they mean, but he's not going to say something and wind up talking out his ass. Not in this weird new place.