While it may be informative, one of the differences between UBI and simply expanding current welfare programs is cultural. Right now, being out of a job is considered shameful, and it's often isolating (since "everyone" else is working while you're not). Even in my holiday-friendlier (compared to the US) EU country, the fact that an unemployed person takes a few days from searching for work to go to the beach is met with scorn.

One of the hopes of UBI is that when everyone receives a salary just from being alive, and working earns you extra on top of that, whether one works become more of a choice (like living frugally) instead of a failure, and loneliness is reduced when unemployment isn't an evil to combat, and more people choose to do something else.