While this is certainly pragmatic advice, we should not normalize it for "what ought" to be. It should not be an individual's job to act perfectly (while being assaulted!) to compensate for police officers' (supposed professionals!) inability to remain in control of their emotions and properly judge what is going on. A police officer who is unable to remain in control in such situations should not be doing traffic stops (or really any interaction with the public) in the first place.

(Also there are some mistakes in your framing. For a regular motorist who isn't planning on attacking the police officer, putting your hands on the steering wheel does nothing to effect the officer's safety. We're talking about a point before they've given you any orders beyond signalling you to pull over, so there is nothing to follow. Furthermore they're also generally pointing a bright spot light directly at you, destroying your awareness and ruining your judgement, so it's reasonable to expect that orders are going to be followed sluggishly and imperfectly)