I don't think they need to do anything with sidemarkers, headlights or anything like that for an oil change. Pretty much just jack the car up, remove the belly pan, drain the oil, etc., etc........ I sorta understand your annoyance to a degree, but sometimes bulbs just go out. Not really something that can be blamed on the dealer. Just feel lucky that you don't have HID headlights which would bring the bulb from $8 to $90.
I understand you're frustrated, but think about it: you started a thread called "I hate vw dealerships" and trashed them as if you knew that they had done something wrong.
Bad enough trashing someone online, but trashing someone without even knowing how to far from the truth you could be is idiotic. For someone who not admits he doesn't know (unless that was completely sarcastic) you sure talked like you did.
It's a lot of reading, but it's all in there.
And by no means am I trying to call you out. Your message reminded me of this is all.
2016 Golf R / Oryx White / 6MT DCC & Nav
Do you think it helps them build trust? Loyalty? Do you think it gives them a happy customer? Do you think they make money off of you for the bulb?
No. They get a pain in the ass. Because now they have a bummed customer that needs their car attended to immediately. That means they need to stop the technician from whatever it is they're doing, push the other customer aside, and help you first. this causes the dealership to lose money, and time, and hurts customer retention.
If a tech notices an issue while your car is in the shop, it does them so much more to attend to the matter then as opposed to after you have your keys and it's out. Saves time, money, and builds better customer retention.
Now I'm not a fan of dealers either, but validate your reasons before ranting about something that is beyond someone's control. It's a f*cking light bulb.