I think there is a lot that is lost by society's tendency to group similar people and people's natural tendency to seek out those who are similar to each other. When all the elderly people get put in retirement homes think of what is lost by those who could have benefited from the elderly person's years of experience and wisdom.
If you want to be a better entrepreneur, you are probably going to find an older entrepreneur who has some experience to teach you something, not one in your peers. Well, if you constantly surround yourself with those similar to you, how are you going to be challenged to grow as a person?
Edit: I am not trying to be snide, but you don’t actually have to talk to people to get an understanding of their viewpoint. Try reading some books from the far left and far right in the US and you will start to see how the other side thinks. Heck even tuning into Fox News, NPR, and the BBC in the same news cycle is useful.
The problem with using only books to try and understand what people who are disagree with you think is that they aren't interactive. While reading something you disagree with, you will probably find yourself thinking "Well, what about X", and if the book doesn't explicitly address that issue you will never know what they would respond. Even worse, people tend to assume that those who disagree with them don't have an answer to their objections, rather than that the book simply doesn't address them. If you are instead talking to a (reasonably knowledgeable) person, they will be able to at least give some sort of answer to your objections.
That's true. But it's more meaningful from the societal level than the personal. As an individual looking for interesting or useful things you don't already know it's usually far more efficient to read a few books than to spend the same amount of time getting to know people outside your circle.
Now if you want to learn something that a large number of people don't already know then goes treasure hunting. But, suggesting people need to talk with a wide range of people to grow as a person is simply untrue.
If you want to be a better entrepreneur, you are probably going to find an older entrepreneur who has some experience to teach you something, not one in your peers. Well, if you constantly surround yourself with those similar to you, how are you going to be challenged to grow as a person?