I mean, if you applied this logic to brakes they'd have brake fade. The temperature of the brakes are modelled, they use it to determine when the brake rotors glow and how bright. We can see it. But that data isn't used in the physics system, it's visual only.
Just because something appears visually doesn't necessarily mean that Polyphony has chosen to link it into the physics system. In fact, until proven otherwise it's safer to assume that it's not part of the physics system based on what they've chosen to do in the past.