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These are familiar arguments. After beginning a discussion a while ago about one-way streets, it was suggested that I refer to "The One-Way Epidemic" section in Walkable City, which makes these same claims. These pieces all serve as good examples for discussion purposes. I wholeheartedly agree with the need to redesign New York City's streets to be safer for pedestrians, and I share the majority of the views of these safe-street advocates. I find some areas of common ground regarding one-way streets, as well, but it is useful to draw out the key differences as well as the overlap to illustrate why the rhetoric against one-way streets is overblown and counterproductive.
Let's start with the term "epidemic" used in Walkable City. This is rhetoric that invokes fear. The book explicitly compares the creation of one-way streets with an outbreak of influenza that killed 20 million people in 1918-1919. The not-so-subtle claim is that one-way streets are an imminent threat to your life. Avoid them like the plague!