Panels and a few wires. Not that complicated. No moving parts; so very few reasons for this to break. I've seen some pretty beat up panels on boats that are very old and still allow people to charge their phone and have some lights on inside. Super robust stuff.

This particular car is priced quite nicely even if it came without this. So does not sound like there is a lot of extra cost.

I'm guessing manufacturers spend more on things like seat warmers or other stuff manufacturers put in cars these days. Also these things are probably more likely to break.

And if you consider the environment, imagine the energy savings over the life time of the vehicle not charging from (potentially) dirty sources. It would only be a waste if that energy wasn't used which would require you to religiously plug it in the second you stop driving.

Also, panels can be recycled (just like cars and batteries) and mostly don't contain that much nasty stuff to begin with. So, I don't see the problem here necessarily.