The horror at this from the cyclist community is why anti-cyclist sentiment is so strong.
And pedestrian infrastructure is just horrible designed for wheeled vehicles in the first place. As people with kid strollers and wheel chairs find out quickly.
The actual solution, that pretty much every other first world country in the world has recognized is to start to build proper safe infrastructure for bikes (and the US overwhelmingly has plenty of space for that). Or to lower car traffic speed such that sharing can be done safely.
If the US had huge sidewalks everywhere and fantastic design for access of wheeled vehicle, your suggestion might make sense, in the actual world, it doesn't, it just makes the world worse for people that walk and those that cycle.
This is literally already all figured out and backed up with plenty of research but somehow people have to come up with their own 'solutions'.
So many people jog in the streets exactly for this reason. Sidewalks are often poorly maintained and falling apart. I'm not sure how anyone handicapped is supposed to get around.
In a previous life, during heavy winter storms, I would commonly walk in the streets because they were maintained while the sidewalks were covered in ice. The city once changed its plowing algorithm due to angry drivers but for sidewalk maintenance they act almost powerless.
Years ago I visited Amsterdam and the pedestrian experience was incredible. It was like walking around a theme park. Ever since that experience I can't unsee the hell we've created in the states with our cars-first mentality.
That makes no sense at all, something tells me you hate cyclists and will continue to hate cyclists wherever they are.
My favorite unsubstantiated theory about anti cyclist sentiment is that exposes the radically car centric nature of US society and people don't like noticing that.
You think mixing 2 kph pedestrian traffic with 20 kph bicycle traffic is a good idea?
(Sidewalks are probably called that for a reason.)
But if it's a Chicago intersection and you just said I'm on a bike all 12 lanes have to yield to me and you zoom diagonal in front of cars... the Darwin Awards are never short of applicants.
E-bikes and scooters and stuff have made this 1,000 times worse. The number of drunk kids who think they can go max speed down a hill through intersections and cars will just magically make way for them... Terrifying.