They ALL do. I've never heard of any dealership who has a "glass guy" in house who does windshield or other glass work - it's always gonna be an outside company.
I had my 2nd windshield replacement done at my dealer because their service department had already proven to be surprisingly competent, and I figured that their contracted glass company probably had plenty of VW experience and since they'd be doing the work right there at the dealership, with OEM glass, would *probably* do a good job. They did not disappoint, the workmanship was perfect. After the previous debacle with Safelite it was a huge relief.
There is another reason for going through the dealership and that is to reduce the finger pointing when things go bad. At the dealership, THEY are responsible and you can always escalate to vWoA. Try doing that with the local glass guy.Many dealers contract out to glass companies. On my 2016 golf I took it to the dealer because it had embedded defects from the factory.
The company they used caused paint damage to the outside of my a-pillar, didn’t even install the glass straight, cracked the plastic cowling below the windshield, somehow managed to slice through one of my windshield wipers and damaged both of the rubber strips on either side of the windshield. The car was given back to me in that condition. I was fucking FURIOUS.