Not really a dumb concept when you look at it. They need proof that you have the ability to pay for something at a later date when you said you would. Also, pick a good card that can give you rewards.
Not to be "that guy," but credit reports show a person's willingness to repay.
Underwriters are responsible for answering 3 basic questions on a credit application:
- Do they have the willingness to repay this loan (generally answered by their FICO score)?
- Do they have the ability to repay (done by comparing income to debt, including the new payment)?
- What happens if they don't pay? (In a mortgage, this is comparing the value of the house to the debt. The more equity, the greater the odds the bank gets their money back in a foreclosure).
If the underwriter doesn't like the answer to any of those 3 (or first 2 for unsecured debt), your odds of getting the loan go down.