[Katsuki really doesn't want to use Choso as some slap in the face against Yuji's recklessness. The brothers already had that talk, he figures, and rubbing salt in the wound isn't gonna help. While Yuji had no way of really knowing it would affect Choso like that, it didn't give him the excuse of at least not thinking about the possibility.

... okay this is Yuji. Thinking ahead isn't exactly his strong point. And Katsuki has zero belief the powers up in LILITH wouldn't come up with something impressively tempting regards to implants in the future. He knows Yuji's heart's in the right place, so he can't rip into him as much as he wants. But... he really does want to rip him a new one for it. Ugh...]

There's a lot you have here to focus on already. We're helping and protecting people every time we go out. But I don't go a single damn day not wishing I was back home.

[Yuji deserves to hear that. He's not the only one suffering under the feeling of guilt and helplessness that comes from being trapped here. Katsuki has already said once before he wants the memories to return with him. He doesn't want to forget Yuji, Denji, Raidou, Megumi, Nanami, even his time with Shoto and Izuku in this place. Reality says they will, but...]

I don't know what we'll take back home, if anything. [He said Yuji didn't earlier, but how does he know? He didn't return home with Yuji; Denji went back home too and came back, yet said nothing about improvements or memories here or there. It's not that he can't understand the feeling this is just wasting time in a world with problems that are neither theirs.] But even if our time here doesn't mean shit back home, we're not wasted here.

[He gets Yuji's frustration, though it's hard to put into words. As they emerge outside, Katsuki's car waits for them in the lot.]