I still find it an amusing trope when the pinnacle of a craft in Anime complain that the "new generation" or lesser members of that trade (almost entirely combat arts, as anime would have it) are indicative of a drop in baseline quality. Like, they are so far removed from mortal constraints that their lament is the weakness of others. It's haughty as all get-out, but I still smile when I see it. It is actually a better indicator for me that these people are beyond what most are capable of, in a weird way.

At least Tanjiro demanded justice he could never have for Nezuko getting hurt. He's borderline sis-con sometimes with his protectiveness.