I agree that some very small subsets aren't worthy of attention, but I don't understand how any person would willingly isolate from the views of "vast subsets of humanity".

How can you be so sure you got it right? How do you check for blind spots if you don't regularly expose yourself to opposing viewpoints?

I ask this because some of the best decisions I ever made were only possible after I considered the "other" side. Most of the time their views fail apart when subjected to scrutiny, but sometimes my view is the one that is found lacking.

I think fuzzing viewpoints with honest dialog is crucial for a healthy society.