That does sound like a frustrating experience Craig! To be fair, I actually don’t know if I believe humans are inherently selfish. My personal viewpoint is that humans are, well, humans. We evolved to be sometimes selfish, sometimes generous, it just depends on our environment and how we were raised.
What I do think is revealing about your experience is how you came away with such a negative experience but the evangelist thought they were doing the right thing. It’s a good reminder how there are always two sides to any story.
One small moment in Milan slightly soured my experience, but maybe the woman who asked me for a photo was also frustrated that I didn’t carefully take her photos?