Pretty sure it's hard to spend equal amount used on car infrastructure on bike infrastructure, they might need to overengineer to make bike infrastructure as expensive.
Its really really hard when car infrastructure directly undermines it.
There's a really big, new, expensive bridge near me, only for bikes and pedestrians, but nobody uses it. Its because its a fucking pain in the ass to get to with a bike or on foot. Every piece of bike and pedestrian infrastructure has a car shaped obstacle in front of it.
I'd love to walk or bike but I hate stopping at intersections every couple fucking minutes and each one is 3-5 minutes of waiting since I live near a busy road. One time I had to wait 15 fucking minutes. I began timing it with my phone since I was getting so frustrated and that one instance made me stop walking and biking to places. I know its best to walk etc, but where I live, its a huge waste of time
I work only a mile away, I myself can walk a mile in 15 minutes easily. Walking to work in practice takes 30-40 minutes because I'm stuck fucking waiting for most of it. Driving to work takes less than 5 minutes.
Yes I ride on the sidewalk. I'm not crazy enough to share a 40 mph road with Americans. Since driving is essential to live, requirements on licenses are very low, as to be obtainable with everybody, from students to the elderly. That's why retesting is so unpopular, if you fail it, you can't live until you pass. That's qlso why DUI's and other traffic violations have such lenient sentences. There are people amongst the free population with like 2 dozen DUIs. Due to low standards, drivers are terrible, american highways with 60mph speed limits are 2x more dangerous than the autobahn.
In the 70s it was way fucking worse, an American GI injured, in combat, in Vietnam had a better survival rate than victims of a highway carcrash.