I think they probably meant the Netherlands' general urban planning principles. Cycling access is one small part, but there are lots of other things that can be copied: making it impractical to drive in city centers, restricting commercial traffic to highways and off-hours stops, fully separating pedestrian and cycling crossings, etc.
Here’s another statistic which amazed me when I first heard - apparently 70% of working age Mumbaikars (Mumbai-ites?) walk to work.
That could be another reason why there are so many people on the road all the time.