Under about 30 feet, you should be able to stay close to the middle of the road and avoid them, even if you don't accelerate, assuming a 9 foot wide lane.
Given 1 foot clearance on each side of the vehicle and a vehicle width of 5 feet gives a 3 foot clearance for the pedestrian. It the pedestrian is in the 3 foot area in the middle of the lane there is not enough room to go around. Many accidents are causes when pedestrians panic at seeing the approaching vehicle and stop in the middle of the lane.
At every cross walk, *you* should be looking both ways for pedestrians liable to cross.
You are assuming visibility is perfect at all crosswalks. There are many obstructions such as parked vehicles, telephone poles, other people, etc that obstruct your view of crossing pedestrians. If you add night, rain and/or dark clothing it gets even worse. In one instance I was traveling in the same direction as a pedestrian who was playing with his phone. He turned left into a crosswalk without stopping or even looking. How was I supposed to anticipate that move? Luckily I had time to stop. Had I been ten feet closer we would have hit.
I don't see how you can defend not stopping and looking before entering a crosswalk. Yes, some drivers need to be more attentive but some pedestrians need to be more attentive as well.