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.