Stupid Bus System

I seem to always have problems with the buses. I guess b/c I spend so much time on them. So this is how stupid they are...
The bus I was one was early, so the bus driver takes a break. Totally cool, no problems, I sit patiently. As he comes back, some guy walks up to the bus driver and asks "Were you the bus just now on State St?" The driver says no, he was here. This person is super angry and immediately starts yelling about how some bus had nearly ran over a blind man with a guide dog in the crosswalk and how the driver of that bus had been steadily blowing his horn and apparently being obnoxious. So the angry man says "I'm calling this in." Ok, perfect, feel free.
Except that my bus driver then gets off the bus to go argue with this man (I couldn't hear, but the gestures definitely indicated argument). He is off the bus for another 10 minutes. Ok, fine. I am annoyed, but not particularly upset.
But then, the driver gets on the bus, the angry man goes away, and an older gentleman walks up to the door (which the driver closes in his face, but then opens) to ask about some destination. The driver says "yes I go there, but I have to leave now." So the man gestures to another individual who (not to be too stereotypical) appears to be homeless, and also rather infirm. He is not right by the bus, but a bit down the street. The first guy tells him to take this bus. Meanwhile the bus driver keeps saying "I have to go, I am leaving now!" But the man couldn't walk any faster, yet the driver was totally inconsiderate, and nearly shut the door in his face too.
So my question is: why would you have a pointless argument with some guy (business man, well dressed, nice suit) that has nothing to do with you for 10 minutes, but then almost leave some person (potentially ill and homeless) with the excuse that you are going to be late? Oh and he used the passangers as an excuse "They have places to get to" he said, gesturing behind him. That didn't stop him from chatting with the other man. It wasn't nice. And I just thought I would share, b/c I was aggravated.