What do you mean by wasting it? Is there a particular aspect of an outcome of a UBI study that you worry about?
I mean... if i was given a livable amount of money for no work for a year or two, my quality of life would go up, but I wouldn't quit my job and move somewhere cheaper (where I could get more for that amount of money).
But if i was guaranteed livable amount of money for the rest of my life, that would be a whole different story.
To repeat the point you're replying to - a UBI study that examines human behavior from a set of people who are only guaranteed to be given some livable amount of income for a short period, and not for their entire lives, is completely useless. It isn't actually studying UBI. It's studying "what do people do if I give them $20k or so over a few installments?".
Very boring thing to study. Honestly a waste of time and resources to even bother conducting such a study, the results can be put directly in the rubbish bin.