[dheera]

Okay, so instead of waiting at the platform 30 minutes, it becomes waiting at my destination (e.g. restaurant, office, whatever) 30 minutes for everyone else to arrive or for the meeting/event to start because it is unprofessional to arrive late, so I must arrive 0-60 minutes early, dictated by the train schedule. Doesn't change the fact that I have to waste 30 minutes on average either way.

In many cases, running, biking, driving would all waste less time because I can leave on-demand, even if the actual transit time takes longer.

Public transportation needs to be either frequent enough (e.g. Tokyo, Hong Kong, Shanghai, New York, etc. where rush-hour trains arrive about every 1-2 minutes, non-rush-hour every 5-8 minutes or less) or on-demand (e.g. UberPool, autonomous cars) to cut the time waste.