Reminds me of what I've heard about how bicycle helmets can cause riders to take more risks, so overall accident rates go up (I don't know how true that is, but

Reminds me of what I've heard about how bicycle helmets can cause riders to take more risks, so overall accident rates go up (I don't know how true that is, but it sounds plausible). People who may not have chosen to drive (e.g., tired, drunk, impaired, or otherwise incapable of driving) might choose to do so since they can "lean on" the car doing it for them, and if the car encounters a situation it can't deal with the driver is completely incapable of handling it.