Ya, because people on welfare, food stamps, section 8 housing, ate can manage their finances so well, we should just give them one big check and let them make their own decisions on how to spend it. If I honestly believed all other assistance programs would go away with UBI, I would almost be on board with it. Then I would at least get some of my taxes back to offset the payouts. I do question how much tax you need to collect to give everyone $10k/yr (probably need to collect $15k/yr in taxes to make the $10k payout).
My worthless sister used to get money wired from my parents weekly. They first tried to send her the amount monthly for her expenses, but she blew a months allowance in 4 days, and seemed confused why she could make rent or buy groceries. I assume most (all) of the people on these programs are the same way.