Your comment made me think these extreme interviewers are like a gardener who want to find that one true seed that will thrive when they plant it in a flower pot full of broken glass and gravel.

Also reminds me of a comment by Robert Townsend. Which is a warning about following the practices of the biggest most illustrious firms. In his day that was General Motors etc. Today it's Apply and Google. I think those guys can spend a buttload of time and money looking for the perfect fit out of the line out the door of candidates because, it matters. Bad/Good hire could cost or make the company millions of dollars. It's also hard fire when your company is large.

Your dinky company? A misperfect fit is going to cost you thousands to tens of dollars.