I'm a huge believer in the Peltzman Effect, or the idea that when one safety feature is implimented, humans naturally accept more risk and therefore there is no increased level of safety. People drive faster and more recklessly when they have airbags and seatbelts. If you don't believe me, you probably will agree that you would be significantly less likely to tailgate if there was a spear jutting towards you from your steering wheel.
Point being, I dropped every bike I had, probably 8 drops in three years. All the bikes had crash bars or frame sliders. A year ago, I took the frame sliders and crash bars off, giving myself the full knowledge I'd do significant damage to my bikes from a careless drop. No drops since.
I can't prove that the absence of crash bars caused this, as I'm a young rider so increased skill may have something to do with it. I will say that the care I use now is much greater than the care I used when a dropped bike didn't have consequences.