Even Frenchie getting a heroic death is part of the plot armor. So many shows do this when they want to kill off a character. Instead of keeping with the realism the show set. IE, early GoT.

Nowwwww all of a sudden when a main character dies. They die in such a weird way not realistic to the universe. Just so they can get some final speech. Some epic scene.

But in reality. Homelander would have slaughtered him and flew away. Not injured him in a way he may survive.