Option A: A separate, safe bike lane through the park, not useful for actual transit but nice for leisure.
Option B: A line of white paint at the side of the travel lane that will guide you into the “door zone”, along the right side of cars turning right (and right into you), and other dangerous situations.
Note that there was hardly ever Option C, actual bike infrastructure that was both safe and useful for transit. So this idea that one single cyclist “killed” good bike infrastructure is ignoring that it was never an option to begin with.
So the options at the time were riding on the sidewalk or in the street, and Effective Cycling became popular because it contained some genuinely good advice for cycling on a street with no infrastructure. Unfortunately Forester felt that this was the best and only way to safely cycle, which is why he immediately became popular with state and local DOTs who did not want to build bike lanes.
It is not an exaggeration, he set national cycling infrastructure policy in the US that stood for decades.
https://en.wikipedia.org/wiki/John_Forester_(cyclist)#1978_C...