The real reason Unforgivables are truly unforgivable

The more I thought about it, the less it made sense.

Like sure, killing, enslaving and torturing is bad, which is why people are send to prison.

But if you think about it, it still makes no sense. Yes civilians shouldn’t be allowed to own nuclear missiles because they are weapon of mass destruction. Doesn’t mean a *government* wouldn’t use them. **Like why aren’t aurors allowed to use them? Or even training their special forces on them?**

After all, there are curses we have seen in the book that are way, way more lethal (and you don’t even have to *mean it* to kill somebody by accident), or more cruel than imperio. Even potions could have similar effects for that matter. And the argument about "yeah but you have to mean it when you use AK so it’s bad" sure but when I have to brew a 40 steps potion there is no way anybody does that "by accident".

No I think the deeper reason isn’t about the spells but the way they work.

I think unforgivable curses require putting magic in, of course, but also a part of your soul. Maybe they even mediate through soul contact and not just fly through the air. That’s why Bellatrix says you can’t cast them by mistake, and that Harry said you have to *mean it*. You have to engage your soul for them to work.

The consequence of that is : the more you use them, the more you cripple your soul. That’s why even aurors aren’t allowed to use them but under extreme circumstances, the upside isn’t worth it 99% of the time, and the consequences are just too heavy.

Of course after that maybe a whole moral aspect wrapped the subject, people knowing how bad those spells are along with having them associated with dark wizardry.