For them it'll be a chance to talk with people from different walks of life such as bankers, lawyers, doctors, artists, entrepreneurs, business owners, or COs. Since so many have wide breadths of opportunity they'll be able to talk to people who have had novel experiences from themselves.
I mean the default experience seems to be a sheltered(maybe insular is a better word?[1]) one, but I can't say I'm not similar in my own social circle. I haven't purposefully gone out of my way to mingle with people in other groups outside of my normal social circle except at work/hobbies/sports and really only talk to those I already know at Friday drinks.
[1] Really I'm kind of looking for a word to express diverse sameness. Something you'd use to express "European countries are all the same except of course each is a unique culture". Maybe talking about untraveled Americans(US) except a word to contrast one who only lived in their rural town vs one who worked and lived from New Orleans, to Detroit, to New York, to Nebraska, to Hawaii and Alaska while not having left the US.