"It's a possible solution to a problem we have no idea how to fix"... that's accurate, and is probably the most charitable way to describe UBI. Except I would have phrased it as "a farfetched but technically feasible solution".
What you're ultimately talking about is a centrally planned economy... actual communism, in other words. It's an idea that did not make sense in the past but might make sense in some distant and hypothetical Star Trek-like future, where enormous production capacity for all sorts of goods and services is available through AI and through humanoid robots. But it requires a government which is capable of directing that production capacity towards socially useful ends, confiscating a large part of the output, and redistributing that output, all presumably in some democratically determined manner.
To point out a few of the obvious hurdles:
* This sort of central planning is something that has never been successfully achieved in human history. Indeed, it's fair to say that every attempt has failed spectacularly.
* "UBI" as envisioned in TFA would barely scrape the surface of the problem-- they're talking about $12,000 per citizen per year, which is far, far below the current poverty line, and even the current income needed for physical survival. And even that level of "income" would require a doubling of tax revenues.
* The central planning would have to take place on a worldwide scale, not simply a national scale. If we imagine (for the sake of argument) that the US miraculously transitioned to a centrally planned economy, this would provide no long-term stability if the rest of the world is sinking into chaos. The US would simply be inundated by refugees from the other 7 1/2 billion people who are looking for their $12K/year.