Misunderstanding the 12th

I was reading through a sub about Jupiter in the 12th and the consensus was these people had divine protection or immense luck in the darkest times or most dire hours.

I thought the 12th signified madness, isolation, hidden enemies and other maleficent things. Wouldn’t planets in the 12th be expressed negatively? I would assume Jupiter in 12 would mean excess isolation or a magnification of self undoing.

When do planets in the 12th strengthen or subdue the negative themes of the 12th?

EDIT: it seems the association with spirituality comes from the Twelve Letter Alphabet assigning Pisces and Neptune to the 12th. I thought there was a consensus that that was false and not traditional astrology?