[Kazu-kun]

Well, as Flere821 said in a post above, the issue isn't so much the use of this trope but the abuse of it.

Spoiler:

There's no doubt people's emotional respond to this particular trope is very strong, and that makes for a pretty effective plot device. All that is true.

On the other hand, if you use it repeatedly, it makes it seem like you're being lazy and/or lacking on creativity to think alternative ways to get strong reactions from your audience. This abuse also cheapens your plot device to the point your audience might not take it seriously anymore.

Overall, I think moderation is key when dealing with strong (emotionally speaking) plot devices.

The argument is moot though. We'll see what happens in volume 11.