One thing that I've never seen "New Urbanists" address: How pedestrianizing streets forces interaction between pedestrians and cyclists. The only times I've seen people like Jason bring it up, he shrugs it off and says "Hey, you get used to it!". I've lived in the same city for nearly thirty years, one that would basically tick every one of his boxes for a perfect city other than "It's literally just Amsterdam", and... no, you don't. You're a fucking liar, mate. It's a persistent, low-level annoyance.
I'm significantly more worried about being hit by a bicycle than I am by a car. Why? Because the cars are kept away from pedestrians. If you're walking, the only time you have to worry about them is when you're crossing the street. And if you're not legitimately retarded, it's actually very easy to avoid them. You just look both ways as you're crossing the street. Bicycles, on the other hand, are completely erratic and unpredictable. If you're walking down a 'pedestrian' street, a bicycle can hit you from basically any direction.
Is it worse if you're hit by a car? Yes. How many times have I had to jump out of the way of a car to avoid being hit by one? Never. Can't say the same about cyclists. And e-bikes have made things much, much worse, because now they can hit you at a speed that can cause genuine damage. A friend of mine has permanent chronic pain after being hit by a Deliveroo driver who hit them from behind and was riding down a street where cars weren't allowed. The cunt didn't even slow down or stop to see if she was alright.
The funny thing is that roads generally make a difference, in a positive way. Bikes (and e-bikes) will ride on the road instead of the pavement when one is there. When you're in a "car-free zone", it's chaos. The result is that, as a pedestrian, I feel safer walking down streets where there's cars next to me, because I'm less likely to get hit by a cyclist, and it's the cyclists I have to watch out for.