Guide. Yes.
Choose. No.
He does not usurp or substitute for the vagaries of fallible human choice.
Analogy: Holy Matrimony us just as much a Sacrament as Holy Orders. I asked God to guide my choice of a spouse, and I am convinced He did. But: “my” choice. I made the choice.
Then there can be no claim of the church being kept from error in teaching of faith or morals.