The issue with drunk driving and texting is not that they can’t focus but can they when they have to. Unless someone’s slam dunk, they can. It’s the time to react when something happens that’s the problem.
With texting and driving there are other major daily hassles. A common scenario for me as I walk my dog is that I no longer assume a car will yield on a crosswalk - even the ones with a stop sign or a signal. May be the impact is that few people bike or walk? Or walk elsewhere like a trail or a park instead of sidewalk and neighborhoods? End of the day, it’s about what we want as a society. If we decide that people should be allowed to focus on their phone, we have to start redesigning the streets now.
Not just as a pedestrian, even as a driver I don’t assume I can go in green light anymore. People seem to miss red lights on the regular now