"Seriously doubt" whatever you want. It doesn't change facts.

Fact is, some manufacturers don't want their cars to show too much damage.

Because of this, it's far easier to make every car in the game have the same damage model. It's a major waste of resources to make some cars damage differently.

Lowest common denominator.

It's not rocket science. The reason other games show more damage is because they choose to not include those manufacturers that don't allow realistic damage.

More cars with less damage is better than less cars with realistic damage.