Cycling can never be the complete answer (weather, etc.), but there's no reason it can't be a big chunk of it (30% of all trips in the Netherlands). It's also cheap to build compared to mass transit
I agree that transit is ultimately the most important.
Mass transport should be bike (or it's advanced-tech equivalent) friendly. Not just 1 or 2 spots on a bus/train, but many or all spots should allow bikes.
Then it won't be a question of mass transit vs. bikes but both together - that'd make a bunch of more commute options workable for me.
I agree that transit is ultimately the most important.