Chandrashekhar thought it was because scientists develop an arrogance towards nature. These are often pioneers in their fields, they make far-reaching contributions. Their success makes them believe that they have a special view of science, a somehow right view of science.A terrific post on the great physicist (also a great leg spinner and whose mother translated Ibsen's "A Doll House" into Tamil.)
Useful rule #1: Don't believe in authority (aka "watch your parking meters")
Useful rule #2: Don't believe everything you read.