In the event of missing payments, you are absolutely correct. But keep in mind credit card companies can garnish wages or put a subordinate lien on your personal property after getting a judgement should it get to that point. And when refinancing unsecured debt into secured debt, the newly increased balance is usually re-amortized back out over the original term and not the existing (depending upon the options available). This not only reduces the amount paid in finance charges by as much as $2500 to $3000 in some cases but also reduces the amount of monthly payment obligations in those cases by 50 to 66%, creating more disposable income each month.
Specifically, someone with an average credit card interest rate of 19% and a total credit card balance of $5,000 for example would save quite a bit of money when absorbing that debt into a secured auto loan at a rate of 3.99%. In this example, because of the equity attained after one year of on-time payments, and a re-extension of the term back out to the original loan length of 60 months, the new auto loan payment would increase by less than $100.00, where as individual credit card payments (depending upon the number of cards carrying that $5,000 debt and their respective rates) may easily total $250.00 to $300.00 a month.
And if someone's credit score at the time of refinance is better than it was when the loan was originated, they could save even more money if the refinanced interest rate is less than their existing auto loan interest rate. Also, someone with a static credit score could still save more money if rates are cheaper at the time of refinance than what they were at origination.