Since time immemorial people have used Public transportation. Despite its cons people prefer it for its large number of Pros.
Pros
It is cheaper than your private transportation (cars/bikes)
People of all age groups can travel (even those who don't have a driving license)
People preferring public transportation decreases the number of pvt. vehicles on road reducing traffic and ensuring its free flow.
Lesser chance of breaking traffic laws.
Lesser road accidents (as road accident is one of the major causes of deaths in many countries)
People follow a disciplined schedule to board a public transportation mode (not much delay in going to the destination)
Depending on public transportation reduces pollution.
You get to meet people from different backgrounds (cultures, races etc).
Get rids the phobia of travelling alone with strangers (which teaches one a lot about oneself)