I am absolutely not arguing we can tell people on a whim. We totally need to be careful. But careful is not the same thing as paralyzed, which is what we have been in regard to the witchbomb.
OK, my read from this and your previous post is that you
are understimating the Witchbomb quite a bit.
The Witchbomb's effects are far beyond mere Grief build up. Keep in mind the people to whom the Witchbomb is relevant are teenagers, which from a
psychoanalytic perspective are human beings in a state of crisis. They're not supposed to have a stable identity.
You drop the fact there's a monster inside their souls that's waiting to kill them and take their place, the same kind of monsters they fight every day, too? There
will be consequences. Even if they might not be
visible consequences. In fact, it's usually worse if you can't see consequences from something like that.
Many meguca could start to see themselves as witches/monsters, just like Homura sees herself as inhuman because her Soul in a shiny rock.
This is without even taking into account the respective guca's cultural values. I know most people in this board would be super OK with being Liches, but we know that's not how the PMMM main cast reacts.
Witchbombing megucas will always have more detrimental effects than we can see. The Lichbomb is bad enough with some meguca. The Witchbomb can and does kill. (Hell, the Lichbomb+bad circumstances killed Sayaka in canon).
For a pointed example, in one the spin off mangas, Mami gets Witchbombed and doesn't immediately die. She takes it, talks about it, deals with it, and kills herself a few days later because she can't stand the guilt. It's not far fetched.
The reason we could seem 'paralyzed' in regards to the Witchbomb, is because we currently
can't deal with it. Simply as that. Current plan is simply to not bring up the Witchbomb, and try to soften its impact in case it does come up at some point. E.g., research de-Witching; even if we don't actually manage to de-Witch a Witch, if we could
show that de-Witching is theoretically possible once the Witchbomb comes up, that could help
a lot.
It'd give meguca something to latch onto.