Very true - it's also natural that we gravitate towards people who share our world view... people who think similarly to us and who share our values and perspectives (perhaps why those who are being introduced follow the same approach as the introducer).

Disagreement and listening to "opposing" perspectives is a healthy part of life and gaining consensus from opposing views will always lead to better outcomes, but seeking that opposition... looking for people who see things differently is almost unnatural in today's society and demands a level of energy and patience that few of us possess.