Have you ever stopped to wonder why so many people are boring?

I have.

I think the reason is that they are incurious. They don't ask good questions often enough. Perhaps because they don't valued knowledge and understanding beyond a very limited range, perhaps involving their career.

It has been said that we can stand those who bore us, but not those we bore. 

I've often said that I don't mind being accused of anything except being uninteresting.