Hands on the steering wheel for your and the officers safety until they ask you to do something. It really is not that difficult you can always just ask. Legally speaking a traffic stop means you are detained = follow orders.

They don't know you or what you could be capable off.

> It really is not that difficult

If you do that daily, sure it is easy. But a lot of human behaviour is automatic, based on what we are accustomed to do daily. (During covid there were many videos, where person on the screen says “… also avoid touching your face …”, while touching his/her face)

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)