Or they used to be.
Seems like common courtesy and kindness are on the way out..which is sad.
Simple human kindness to others is not much to ask. Example, i just had pizza delivered, I made sure to give them a smile and a warm thank you. We dont need to tip here, he was just,. as you say, "doing his job", yet it costs nothing for a "thank you sir, have a great night".
“Do things for people not because of who they are or what they do in return, but because of who you are.”