It's called "Holding firm in a belief that gives someone comfort in a crazy world."How can anyone who knows anything about the Holocaust, all the wars endlessly killing people, the horrifying diseases of people and animals, famine, mass shootings, natural disasters wiping out millions, and especially human stupidity and hatred, believe that all that is part of "God's plan?" What kind of god would have such a plan? Would you really worship such a being?
It's just a mindless bromide, another way of saying, "We just don't know."
We need a "plan" to be kinder to each other, and to the planet. It's up to us, and OUR plan. Leave the imaginary stuff out of it.
For some, a comforting fairy tale is better than harsh reality.