Better yet, if it isn’t for warranty service, skip the dealer all together. Your warranty holds up as long as you follow the recommended maintenance procedures in the manual as long as you keep the receipts. Find a good, local, reputable, ASE certified mechanic, and have them look after your car at each service interval. Keep the receipts, and you should be just fine.
And no - you don’t need these services - take J E Meehan’s advice and ask them why you need it and why these services aren’t listed in the manual. They’ll have an answer that sounds really cool, but tell them you’d rather just trust the recommendations of those who engineered the car. For extra fun you could add at the end: “What do you guys have a boat payment due or something?”