The whole exercise turns on whether Ford will agree to undergo the new and risky operation.
"It would be very risky operation to challenge him."
She convinces him to get a risky operation, even if it means he cannot remember her, so that they can have more time together.
Doing so is the precondition to building support for an obviously risky operation.
No one wants to risk alienating it by undertaking a risky operation.
It was a risky operation that could blow up in their faces.
Indeed, even a less risky operation cannot be required.
And since this is a pretty risky operation, you'd better send a service message asking what you're to do with yourself.
Financing a new business is a risky operation; you could lose a lot of money.
But he added, "Everyone knew from the beginning that this was a risky operation."