Much like in our current capitalistic setup, if UBI is more appealing than work, then it usually indicates a problem with that work.The thing on UBI I’d be concerned about would be actively encouraging unemployment by people who are able to work. I’ve pretty much seen it in the newspapers where people have quit their low paying jobs just to hop onto unemployment benefits because it pays more than their low paying job. Granted unemployment benefits are supposed to be temporary in nature. I feel that UBI should largely cover expenses you make when purchasing food and transportation to and from work, as a form of supplementary income not a substitute for income from work.
Then comes the other factor of also implementing a UBI to take into account of cost of living in an area. For instance, when comparing the CoL of Tennessee with the CoL of Massachusetts, it’s much expensive to live in Massachusetts because the state (especially if you’re within the Greater Boston Area) is much hire than that then living in Tennessee.
There are absolutely challenges to making any form of UBI work without completely tearing down society, but "people might not do jobs" is far too generic to be a useful argument. As I mentioned earlier, at the other end of the scale we're stuck with anecdotes. Neither are reliable in structural terms. But I think it's a safer bet to assume that problems in motivation can be solved without using it as a reason to not have UBI.
History is full of examples of humans choosing to be productive. If large-scale motivational issues are introduced with UBI, I'm willing to bet those issues are symptomatic of other problems than they are UBI itself. And that's assuming said issues are anything more than short-term (i.e. during transition. It's easy to take a week or a month off after working years of 50 hour weeks. But proving that said person would never work again is far more of a stretch).