They're going to collapse the entire underground? This seems like something the villains would try near the end of the series. Upping stakes quite a bit for what I assume isn't anywhere near the end of the story.
Make fun of the way I run LOL. Why do you have to run like that?
Hey, the anime changed the angle of that Lucky Lecher Lure moment to be less perverted?! THIS IS AN OUTRAGE!
But we saw how tiny it is. It's not necessary to remove the whole ear. If they don't have the time or skill for surgical precision they could just remove the bottom part of the lobe.