I really thought Texas was going to be up there in the list because where I live it seems like they hate pedestrians.
I've been on a sidewalk and suddenly it ends with a guardrail taking up the space the sidewalk should have been and my 2 options are to walk on the road where people regularly speed or follow a path under the trees that is clearly unmaintained, I follow the path and it recently rained so now I'm muddy and my upper body was wet from having to shield my face from the tree branches that were still holding the rain water and at the end of the path the sidewalk continues.
It's the smartphones. I'm in TN, and every time I'm out on the road I see a ton of people devoting most of their attention to their phones while driving. I've even seen the cops here driving and texting 😐.
The US is outpacing other developed countries with just as much smartphone use. Perhaps their drivers are better or enforcement is stronger, but part of it is probably also that the average mass, hood height and other stats of US cars are exploding far more than in other countries, as we buy more SUVs and pickups