One argument I never see in UBI discussions is that some people are just bad with money. If you give more money to someone who doesn't budget, save, live within their means, etc, it won't help. There are people who spend beyond their means and then get payday loans. So while it would help some people who would spend wisely, many would not.

You would have payday loans 2.0 where people would borrow against future UBI payments, spend on non necessities, and then be in an probably worse situation compared to the people still receiving UBI.