Because it's so fake, and so corny.
Also he mentioned that impoverished people relied on the taxis. Impoverished people cannot afford taxis and taxi drivers are not big on giving free rides.
It's part of how it's easy to stay poor. There was a while when all I had was a bicycle. When my bike got stolen I didn't have the money for another one, but over the next three months spent more than a bike would have cost on unavoidable and otherwise-impossible transportation. Mostly I walked (including three miles to work each day), but sometimes the cost of the cab was less than the money I'd loose by not being somewhere.
I do understand that public transit is not available for everyone, but for people who are impoverished, often the $10 - $20 for a cab ride isn't available either.
Honestly the inclusion of him helping the impoverished and old ladies just seems to be him buttering up his image for the story.
But there are plenty of large towns and cities that have terrible bus service.
May you choke on your cynicism while you sleep.
Edit: what, no downvotes? Clearly I have no idea what motivates you people.
EDIT: Oh wait, I see now! It was not your intention to actually emulate the hilariously 2D caricatures in the story and be sympathetic and nice to all comers, no that something you reserve for the safe idealized realm of fiction where there is no chance for disappointment by the messy and contradictory things we call humans. I've got your ticket man and you seem to be in good company with the majority of HN, I mean who would have guessed that the money hungry posers on this site would be into empty sentimentality?
Edit: you talk too much.
I can agree that the person telling the story did a good deed without feeling overly moved by the story.
edit: it seems to be true in the sense that the guy wrote it in a book years ago http://www.truthorfiction.com/rumors/c/cabbie.htm
Seriously, #1 on HN and it's not even remotely about hacking.
Flagged.
Not to discount it, just saying that not making you cry is t that bizarre.
[edit: it doesn't matter whether it's real vs fiction, it's a question of how you would react if you did something in the normal course of what you do, and then come to realize at it had a profoundly positive impact on someone else. Is not the romanticized part of the modern conception of a startup a blend of changing people's lives positively at skill via products that make the world better plus a dash of hopefully positioning yourself to there after only work on projects that capture your eye?
I will not dispute that the story here is cute and possibly fiction. But even if your day to do focus is building better tech in some domain, it's about building better tools for other people. ]