It's instinct. When I was in HS somebody rear ended me at a red light. No big deal really, except that he had been driving like a ******** before finallyYes. If you apologize, you have admitted guilt. Why would you apologize? It doesn't change the outcome for the "victim" and can be used against you
No damage done to my vehicle, but enough to his so that we had to report it
After I got out I said those two words. When his insurance company called me they tried to make a big deal out of it... until I mentioned that my coat had been torn when he dragged me out of the car.
Total silence. It shut them down completely when they realized I had been trying to keep from getting into a fight.
In hindsight I should have gone for more than the value of the coat. Among other things he was lucky to dodge an assault charge.