that is untrue, and a disingenuous argument. there is no requirement for violence simply to arrest them.
but if street racing assholes decide to escalate to violence (and a car is a weapon), then both staying alive and protecting the public requires willingness to use lethal force in reaction to the criminals' violent and dangerous behavior.
and that isn't disproportionate at all, that's how it should be. and i'm grateful that there are people who make that sacrifice and have a willingness to protect me with lethal force if necessary.