Those who are certain in their religious beliefs need to be challenged.So do those atheists and agnostics who become self satisfied as if knowledge is finite
I do not think you understand the concept of Science...Always seeking, testing, revising, not ever "self-satisfied". Whatever makes you think That??!
I did not mention scientists only agnostics and atheists although doubtless scientists along with lawyers and cleaners are amongst them.A true scientist would of course not become self satisfied but not all scientists are active in any particular field so it is possible for those calling themselves the same may not be curious to learn ever more and their knowledge may well become obsolete.