general problems of the 2014 Infiniti QX60

Arrived home, turned off engine while walking away from the car noticed the right front head light was off. After trying a few times to assess the problem, on 1/17/2022 took the car to the service department at south motor Infiniti dealer (where car is always taken for maintenance). A few hours later, after they did a diagnostic report ($217. 00) the service rep called us to get authorization to repair, the "ballast is fried must replace headlight", (cost $2,541. 00 + tax) and recommended to repair the left front head light because it was very likely to fail also, another $2,541. 00, we declined to do the work, simply cannot understand how can a light bulb may cost so much, is this logical? or maybe the original part was defective to begin with? today I called Infiniti consumer affairs and they suggested to file a complain with your department, nothing they can do. My car was purchased brand new, sept 2014, always properly maintained by the dealer, no accidents and driven less than 54,000 miles. I will appreciate if you can help me, any suggestions? thank you very much,.