It is such an Izuku thing to do which makes me angry. Like half the point of the Sports Festival Arc was to say ‘self-sacrifice and self-destruction are not the way, they only hurt you and others in the end’. All Might is walking proof of that lesson. I’d thought Izuku had finally, finally, learned that lesson.
But in another way it’s fascinating because people are complex and the characters in BNHA are very well-rounded. Izuku has been prone to hurting himself for others since literally day one. The boy was belittled and abused his whole life and, as an author I admire once said “He’s willing to use his body as a tool to achieve the safety of others and while his own safety remains much lower priority.” It’s such an Izuku trait and, even though he’s verbalized on several occasions that he’s going to try to focus more on his own well-being, these are extenuating circumstances. Or at least that’s what he probably tells himself.
Because there’s always going to be moments where 'X person needs me' or 'Oh it’s okay because this is an important mission’. And like, I get you gotta go full out sometimes but that fact that Izuku can still justify wrecking his body like that tells me that he hasn’t really taken that lesson to heart. Because people don’t change overnight. Izuku can’t unlearn his self-destructive need to help others at the cost of his own health after a couple of months. It’s been reinforced over and over again but, when it comes down to it, it’s one thing to know a thing is bad and another to stop doing it entirely.
So Izuku, like most humans, reverts back to previous lines of thought in moments of crisis. And you’re right, I’m sure some of the heroes will praise Izuku for his Plus Ultra behavior because that’s that way superhero society is set up right now. But you know what I want? badly? I want all those heroes to praise him, but I want All Might to properly scold him.
We saw Toshinori briefly chastise Izuku after Kamino Ward but it wasn’t serious. This time I want our 7 foot sunflower, who made a career how out of throwing himself in harms way for his feelings, to put his foot down. Because hindsight is 20/20 and he knows what will happen if Izuku continues down that path. Izuku is brilliant, his analytical mind is his best feature, All Might needs to smack that boy and tell him to use it. Izuku keeps defaulting to 'it’s okay to break myself in the name of peace’, All Might needs to make it perfectly clear that Izuku needs to eradicate that style of thought. Because if Izuku keeps thinking that’s an option, one day he’s going to find himself just like his hero: half dead and unable to help anyone.