There's a LOT going on with what you said. Im going to separate it for logical discussion and not the order you said it in.
> I see jwalking pretty much every day.
Jaywalking was a created crime by the early car companies to try to take away blame from distracted drivers. https://www.grunge.com/721704/the-truth-about-how-jaywalking... says it better than I.
> One dude I saw just a few days ago was crossing an interstate (see that about 2-3 times a month in the same place).
That IS a problem. However, what is the locality doing to fixing an obvious problem of 'nowhere to safely cross a high speed road'? Aside "fuckit, cross halfway when it looks safe" is basically the only sane response. WALKING up or down an interstate or major highway to get to a light or some crossing way would take 1+ hours to do.
> Then to add to that I see every single day people walking doing silly things and walking into the roads where they should not be.
Are they actually obstructing, or just crossing and you don't like that?
> I see people walking when the signal says to stay put.
So in my liberal-ish city in a republican state, we have basically terrible cargo-cult traffic control. They do shit like "dont turn on pedestrian lights when nobody presses the button", no right-turn on reds even if theres no ped crossing, arbitrary bad speed control, stuff like that.
On the city square, its routine to see no cars cause the lights are anti-timed to impede cars. BUT the light will be green allowing all those cars (NONE!) to continue. So yeah, we look the 1 way - its a 1 way road - and we will cross when we're not supposed to.
Again, this is what happens when you mix blaming pedestrians, poor traffic handling, and cargo cult liberal ideas all together. Makes a terrible situation for everyone.
> I see people darting out from between parked cars.
Again, goes back to car companies criminalizing "jaywalking", in order to steer the blame to humans rather than humans driving a 1 ton slab of metal and plastic.
> But a car doing 55 does not care.
Ah hah! And there's the gotcha. You're not talking about downtown and slower streets, like city residential or the city square. You're talking about Stroads, this bastardized terrible mix between a street (slow, humans everywhere) and a road (high speed, no humans, limited entry/exit). Not Just Bikes talks extensively about it. https://www.youtube.com/watch?v=ORzNZUeUHAM
Yes, Stroads kill. And Stroads are EVERYWHERE in the USA. This US-centric anti-pattern is best seen with a state highway going 55MPH, maybe dropping to 40-45MPH with a town built AROUND this bisecting nigh-uncrossable stroad. They are some of the most anti-human infrastructure we have seen.
> I make sure I cross at the places designated to do so and also make sure there are no cars coming at that moment because some fool decided that was the perfect time to play with their phone.
Thats the problem with stroads and the highways that bifurcate towns and cities. There's FEW places to cross, and the lights themselves are almost never set up to actually allow pedestrian traffic. And you're lucky to even get a sidewalk. And if you do, your door prize is face full of vehicles fumes and super loud vehicles.
The USA has sold off and demolished pedestrian infrastructure for implicitly requiring everyone have a motor vehicle, unless you're lucky enough to live in a rare city with great public infra. (And no, bus lines that share the road with regular vehicles will take you 2 hours to get where your car can take you 20 minutes.)