Every 30 people that bikes to the transit station is one less feeder bus. That's one more driver and vehicle that can be allocated to run between between stations. Mass transit networks would be impractically expensive if they could not offload the edges of the network to human powered travel.

A sad thing is that those are cities where bicycles are actually pretty common, but where they are becoming less common, because of the choices being made about development. The same is true in India and in Eastern Europe. Comfortable, mixed low-speed pedestrian/bicycle/scooter/animal traffic is getting replaced with dangerous high-speed car traffic, complete with traffic barriers. It's painful to watch a mistake get made, on a massive scale, in real time. The American Way is the wrong way, here.