I am sad you have not experienced positive human interactions while delivering. Your experience is more of an exception than a rule.
Last year, a UPS driver was caught up in workplace violence at a stop and killed by a gun. The loss left a huge hole in the daily experience with random consignee's that recognized their driver's face but didn't know his name.
In our delivery world, we, all delivery drivers, have more positive interactions than negative.
We wear uniforms.
We are a symbol of normality in communities devastated by weather events.
We are trusted and held to higher standards.
This isn't Kool-Aid....