I contend its not that there are people "have nothing economically worthwhile to offer" its that the jobs that are being presented are not what they want to do

I contend its not that there are people "have nothing economically worthwhile to offer" its that the jobs that are being presented are not what they want to do or in their interest (i.e. pay what they think is enough). UBI makes sense if all the jobs are taken or jobs being automated away but if there are jobs that are out there that people don't want to do for whatever reason that shouldn't be an excuse to implement it.