biking in the netherlands was never about the environment or vitue signalling, we do it because its necessary. tax and cost of housing is very expensive relative to our salaries. a lot of people cannot really afford cars so we need another option. its more similar to biking in china or vietnam in that sense.
It's a data driven thing at this point. If repeated accidents happen on a particular bit of road, there will very likely be some follow up in the form of infrastructure work to fix things. Any new infrastructure that gets planned, this stuff is designed in from day 1. Much of this work is planned in order of priority based on things like accident statistics.
Many US cities are actually quite suitable for adapting them to cyclists. The roads are wide and there's plenty of room to start fixing the infrastructure to have separate bike lanes, safer intersections, etc. You can start simple with some road markings. It's not rocket science.