Thing is, a ped is wildly unlikely to hurt anyone by running into them. So it's not the ped's ethical responsibility to mitigate the risk that's being imposed unilaterally by a cyclist, the same way it's not a cyclist's ethical duty to mitigate the lethal risks unilaterally imposed by car drivers.

The one who brings the hazard into a situation is the one responsible if anybody gets hurt. That's basic golden-rule level stuff. Exporting responsibility to the victims is just wrong.