Very importantly, with public transport, you don't have to lug this huge metal box around with you, remember where it is, and be sober enough to safely operate it.

You can just go where you like, and if you want to go somewhere else, sure it might not be the strictly fastest option, but it sure is convenient. You can go from A to B to C to D to A without having to go back to B to grab your elephant box and bring it to D.