Yes, I have met people who have ruined themselves financially for stupid reasons. But, that’s purely anecdotal. I could be lying and you would have no way of knowing. That’s why it doesn’t make sense to ask about my personal experience when you’re looking for proof. Here’s something more convincing: There are many stupid people, and many poor people. Naturally, there will be some amount of overlap. So, it is reasonable to assume that some of these people who are both stupid and poor will make stupid financial decisions.