Let's say that the US somehow did implement UBI. You would almost certainly have to be a citizen (or at least be someone who pays taxes with a valid SSN) to get the benefits. Just being in the US doesn't mean you'll get money every month. Beyond this, how does getting UBI benefits give you a cut on your taxes? You would most likely get taxed more with UBI, given you have a job.

There haven't been many studies on it, and sure some people would likely opt to not have a job if they get UBI, but don't discount the amount of people that would be brought up out of poverty and could possibly do something more than they could now simply because they have better circumstances.

Even though I think that UBI will certainly probably never be implemented in the US, given the current system of politics, I would argue that it's inherently a good thing for society even if you are maybe, potentially marginally worse off. A UBI would likely be implemented in such a way that you will have money for the essentials like food, but if you wanted that brand new phone, you would need to have a job to make money to afford it. UBI doesn't mean everything is free, it just means that you don't have to worry about feeding yourself.