I hear you... I try to do mine at 5,000 km intervals, and I do them myself. I was dumb enough to pre-purchase 10 changes when I bought the car, but after the first two... and especially after spending a boatload of cash on an aluiminum oil filter billet cap that I had anodized, I don't want someone detroying the finish on the cap.... or dribbling oil over my engine. So I now pick up the supplies from the dealer, and they record the service as being complete as if they'd done the work there. I'm happy. They're happy. It's all good.
I could be wrong (and often am), but I think clearing the light on the dash is done by the gas pedal process, and the one in the Infotainment System deals with the nag message that pops up on it when the maintenance period you enter comes close to maturity. Theoretically, for those that aren't as dilligent as we are with oil/filter changes, you could set the maintenance period way out in the future and a crazy amount of kilometers... but if the sensors think the oil is in bad shape, that too will trigger a warning. Not applicable to those that do regular and frequent oil changes, but for others it would be a last resort warning to deal with it.