Does it change the point? If we say "GBI appears to work, let's try that" is that different?
I don't understand the questions you are asking at the end. Apologies for not having a good answer.
I was wondering if your correction from UBI to GBI changes that point; these trials seem to work and solve at least part of the problem that this whole thread discusses, so maybe we should try that at a national scale. Does GBI invalidate that?
The core thing that the studies have proven, I understand, is that if you guarantee people a basic living income, they don't sit around doing drugs and watching TV (or at least not for long). Which is usually the main objection from naysayers - the Theory X hypothesis that people are lazy and must be forced to do anything useful. And this is the thing that is disproved by these studies.
You seem more familiar with them, though, is that your reading too?