Depends on where you are.

At least in the touristy parts of Las Vegas, super walkable. Between places you want to go, bus stops, trams, monorail you won't be walking more than half a mile, and any time spent waiting for public transit is like maybe 4 minutes. There are roads, but pedestrians can go all over the place without touching them. Several of the big cities are at least in the ball park, though some screw it up royally.

However, keep in mind in the US, there are 41 states each geographically larger than NL.. But only 4 of those states have more people. Average US population density is 37 people per square kilometer, versus 522 per square kilometer average in NL. It's really hard to make viable mass transit with that sort of density. A lot of internet participants are going to be in areas where there just isn't even a possible plan that would work for them.

Now if you do live in a population hotspot in the US, you are likely to have every reason to say "fuck cars", depending on the city. However, just be aware that with an average population density so much lower, for the average US person mass transit isn't as feasible.