Dealers love $$$$$$$$$$$ or maybe they like having you around the store.
Really; unless you suspect a problem I would not listen to everything the dealer tells you. I see no reason why a bike should be in the shop every 6 or 800 miles?

Some forums will tell you (I am too polite)"RTFM." If you follow the service recommendations of the manual, you will be just fine. That's why they were written.
Dealerships, car and otherwise, are in business to make money, and service is a huge profit center. Car dealers used to routinely give their customers long lists of service requirements, with tiny print indicating these were "dealer-recommended services." Carmakers play into this with statements like " your dealer may have additional service recommendations based on local conditions."

Perform the services listed in the manual, and you will be fine. Demonstrate ignorance of the subject matter to the dealership service "advisor," and you may go for a ride - and not on your bike."
cheers!   Mac