The thing about Youta's logic in this chapter is that it's actually not pragmatic at all. He claims that, in a world where he's the only man, he should keep the girls safe, when it's actually the other way around. As the only man in the world, he is (as far as he knows) literally irreplaceable. If he dies to an accident or one of the many monsters in this world, then the girls will be stuck with their 20-year lifespans. He shouldn't be going anywhere without a heavy guard, and he certainly shouldn't be fighting personally (unless he absolutely has to). That's what the pragmatic option would be, it has nothing to do with being "politically correct".