My good sir (ma'am, or theydy), you sound like someone who's never had to replace something like that out of pocket. Parts and labor. And possible diagnosis time.
To get an OEM factory part for a stereo system in lots of vehicles is expensive as fuck. and a lot of the time to get to the silly computer that runs the system you have to take apart the dash and or center console. I know this because I used to do that as a job.
Headlights used to be a few hundred bucks. Wing mirrors used to be a few hundred bucks. They cost around $2000 now. that's a wild amount of money and these things are drive by a whole separate module that a lot of the time is attached to know or both of the lights.
Car manufacturers still have components on backorder from the backlog caused by the pandemic. And Generative AI is causing all kinds of components shortages. I wasn't making an exaggeration about the cost. Parts and labor, because manufacturers are making it harder and harder to work on your own vehicles is gonna cost the average person.
We aren't talking about walking into car toys here. I'm basing my price range off what it'll cost when it comes with the vehicle and what it would cost to replace at a dealership with a factory part.