You live in nearly the most bicycling-hostile place on the planet. This is important context for your comment.
Everyone's different, but my experience was that leaving LA did wonders for my mindset, health, and general well-being. Though, rather paradoxically, 90% of my bike commute (Santa Monica to El Segundo via Venice and Dockweiler beach) was great. That other 10% was brutal, and my ribs still hurt.
Also - "Nobody will use the bikes because the infrastructure doesn't exist." - perhaps that money could be used to build it?
But while LA is certainly exceptionally bad, many cities in the US suffer from sprawl to an extent that bikes are, right now, impractical. (Which we need to change, no doubt.)
I live in Phoenix.
/right now it's 101 F / 38 C outside...relatively a cool day!
2) No, my partner can't ride a bicycle. As advanced as your powers of remote diagnosing may be, they're wrong. It's not an option. We tried. (I'm from Germany. I'm somewhat acquainted w/ the idea of specialty bikes, and trust me, I looked at them)
3) Theoretically, I might fit my shopping needs on a bicycle. Alas, transportation here is so completely shot that taking that bike onto the road (what bikelanes?!?) is essentially a suicide attempt. Colleagues who have the ability to bike to work usually end up with about 1-2 severe accidents (broken bones) per year.
And yes, e-bikes might address the distance problem. I still can't do it in much less than 2 hours because... I live in LA. Nobody goes 20 miles in less than two hours ;)
4) Even if there was the political will to make it happen, no, not all American cities could look like this without ~20-30 years of rezoning and construction. US city planning is... special.
European solutions cannot simply be transferred to the US, as much as I'd wish for that. (Remember, I'm German - I've lived in cities friendly to people, instead of cars. I miss it).
And that's why the suggestion of getting rid of the e-car subsidy in favor of bikes won't work in the US. Nobody will use the bikes because the infrastructure doesn't exist.
That doesn't mean we shouldn't also work on improving the infrastructure, and on changing city planning, and creating workable public transit, and all those things - but they're long-term projects.