Damage is required in a racing sim. It's also a bit funny that in threads like this you get "I never crash" but in other threads you get "these crazy online drivers wrecked me and it wasn't my fault [of course]". Well, there is a reason for damage then, even if you're perfect, everyone else might not be.
Damage will make endurance racing that much more significant. The current system is very limited, small decreases in performance, even with heavy damage that is fixed within 30 seconds of pitting. We need to have the ability to completely kill a car. Those that survive need realistic repair times. Possibly hours behind the wall that you need to try and make up once (if) you return to the track.
Anyone that thinks damage is a Burnout feature doesn't understand racing.