A lot of it is what
@WRXtoStingerGT said: It's a crapshoot.
Plus, just because it's a dealership doesn't mean they will honor any damage that they do, won't do any damage to your car, and won't try to get out of warranty work if they possibly can. I'm sure it's been said here many times that dealerships often give the oil change jobs to the techs making the least amount of money to maximize their profit. You might get a good tech, but you might get a tech who forgets to put the drain plug in. In that case you might have a service writer who is as much of a scumbag as your average politician (the kind who got out of auto sales because they thought they weren't had-sell enough) who will try every trick in their gaslighting book to get you to believe that the dealership isn't culpable for their own mistakes.
True, sometimes you get a good dealership with good techs--cherish them. But if not they can be just as bad as any seedy shop--and more expensive to boot.
Just on one point.
Dealerships don't try and get out of warranty work. They get paid for warranty work by the factory.
But factories are very strict and will only pay the dealership when it is a genuine "manufacturing defect"
If the dealer thinks they won't get paid they won't do the work. They have guidelines down to the second how long it takes to change a water pump or a trim. They also have a data base of previous faults so they can see what they have problems with, say a hamonic balancer issue as my previous GM V8 did when multiple cars had the same issue and though not a recall issue they were fixed free of charge as cars came past the dealership. If you were after market servicing then you didn't get the fix....
If Kia consistently knocked back new car warranty then people wouldn't buy their cars new. In Australia it is a 7 year Unlimited km warranty and I expect that for 7 years.
I take the car for dealer servicing which I don't particularly like because of the price that I could do for $100.
The 10,000 km service cost $360, it took one hour and they changed the oil and oil filter under their "Capped Price Service Agreement" to all new car buyers, now I can only assume they put in the expensive Castrol 5W30, "A5" oil as specified at $100 for 6 litres and the $30 oil filter. The $15 fuel injector cleaner and the $10 oil flush. That means I paid $200 an hour labour.
But the agreement here between the Australian Competition and Consumer Commission, a Federal government body is that a dealership cannot refuse warranty on a car not serviced at a dealership, BUT it must be serviced by a Licensed mechanic. That allows the aftermarket chains here to offer "log book servicing" that does not affect manufacturer's warranty. Now, I have serviced cars for 14 years with genuine parts and nothing is going to be stuffed up that I would go and claim warranty on, but I bought this car to not have to repair it in any way.
While I hate the service price, Kia cannot turn around and ever deny warranty for 7 years until the end of warranty, so the price I am paying for dealer service makes up for what I would save at home. The fact is I don't even do 10,000 kms in a year so a once a year service price is acceptable.