I would just add that timing belt changes are time dependent; not just mileage based.
Usually around 6 years is the limit and even at that point it’s a crap shoot because a belt can give up at any time.
You should keep in mind that when you’re at the dealer service department you’re talking to a service writer or on a rare occasion, a service manager, about your car and very few of these people have much mechanical aptitude.
Much of what they relate to the customer is utter bilge and it’s done to avoid looking incompetent to the customer.