In all fairness here, I think nitpicking a small detail like the detail of the interior of the car from the chase cam is perhaps a little excessive given that you're focused on a lot of other, more important things during a race. And that's if you're using the chase cam at all. Cockpit view gives you the full detail and looks realistic, and the rest of the views you don't see it at all. Granted PD do like to brag about their attention to detail with the cars but it's also a video game and sacrifices have to be made in places to make sure the game can actually run smoothly. Having to render the full exterior and interior of cars would likely tank performance, and absolutely wreck the online performance.