Cyclists do stupid and dangerous things too. Believe me I am aware. I have to anticipate those too.
But, in my experience, nobody acts with more carelessness and selfishness than pedestrians. And I say that as one of them too.
There is no requirement to mitigate all potential harms caused to unexpected hostile sources by the direct actions of unexpected hostile sources.
Well yes, they are indeed entitled to what they are doing. It is you who is acting entitled here - cyclists are not entitled to having pedestrians dodge them.
Your earlier vehicle example is wholly misplaced. Divers have a legal responsibility to maintain awareness of their surroundings at all times. Pedestrians do not have that. Notice that many disabilities can legally disqualify you from driving.