If you ask me higher rates are justified because consumer's get tricked into it. Take department store cards for example, they charge 25% - 30% because no one thinks they need to carry this balance forward when they are buying a refrigerator -- they just want the 15% off at point of sale and 0% for 6 months is a bonus. Fast forward 6 months, they have not paid it off and the credit card company calculates interest by going back in time as those interests were 'deferred'. Now with all the compounding they end up getting stuck in debt for much longer they needed to be.
For people we give credit to, we focus on consumers with good credit. For others, we will still service them and help them by optimizing their payments and those payments will directly come from their checking account.
Edit: I want to clarify one thing. When I say good credit -- it does not mean you need to have a FICO Score or long history. We look at everyone holistically so it comes to down whether you are a responsible borrower measured across many dimensions.