The poster is alluding to other approaches to road safety. You can prevent fatal interactions through infrastructure and city design. Failing to do so and pinning it on everybody outside of a vehicle is absurd.

Of course, we all need to be mindful of dafety, no matter what form of transport. But our roads are designed and the dialog is set up so that all responsibility is focused on pedestrians and cyclists who aren't the ones in control of a potentially deadly machine.