First, let me reiterate the idea that the “causes of bankruptcy” field in our data is not a perfect field. It's an open text. It's a self-reflection.
Secondly, I almost think 86% is low. I don't know many people over the age of 18 who don't have credit cards these days.
It's difficult for me to answer whether it's a cause. It is often there, but it's difficult to say that it's surprising.