As a job seeker, you may view an interview as an interrogation or exchange of information.
Interviews are sales calls.
And, as any sales pro knows, you only get the sale by asking for it. You aren't begging for a handout when you ask for a job. You're offering prospective employers your experience and ability to contribute to their goals. A little flattery goes a long way. Often the missing part in the interview is the commitment from the candidate to the firm.