Wizards formerly able to cast the Patronus charm, once they realise that Dementors are not about fear but (much more scarily to them) death, are no longer able to avoid thinking about it in the way necessary to make the Patronus charm (v1.0) work. As knowledge of the true nature of Dementors spreads, ability to make Patronuses lapses near-universally. A key tool for keeping Dementors under control is lost. Dementors become much harder to handle, everyone in Azkaban escapes, many wizards are killed (or worse) by Dementors, and the only way to stop it is to get Harry to destroy them all, which is a bit much to ask of a 13-year-old or whatever exactly he is.
Anyone who hears the explanation of Patronus 2.0, but is unable to cast it, will lose the ability to cast Patronus 1.0 and be left defenseless. Most people will not be able to cast Patronus 2.0.
I’m still can’t figure out what’s dangerous about sharing that knowledge. My obviously unsatisfying guesses in no particular order:
*Making yet unreachable sour grapes of immortality more sweet.
*Harry’s concern for self-awareness of patronus v2.0.
*Outlaws will be better protected from law enforcement.
*Increased chances of Azkaban break out.
*Disclosure of Harry’s unique power.
*Extinction of dementors.
Wizards formerly able to cast the Patronus charm, once they realise that Dementors are not about fear but (much more scarily to them) death, are no longer able to avoid thinking about it in the way necessary to make the Patronus charm (v1.0) work. As knowledge of the true nature of Dementors spreads, ability to make Patronuses lapses near-universally. A key tool for keeping Dementors under control is lost. Dementors become much harder to handle, everyone in Azkaban escapes, many wizards are killed (or worse) by Dementors, and the only way to stop it is to get Harry to destroy them all, which is a bit much to ask of a 13-year-old or whatever exactly he is.
He’s still eleven years old.
Oh, thank you. It doesn’t make sense for me, but now I understand.
Anyone who hears the explanation of Patronus 2.0, but is unable to cast it, will lose the ability to cast Patronus 1.0 and be left defenseless. Most people will not be able to cast Patronus 2.0.