Simon, I’ve been saying the same thing for a long time. In a Medium column (Medium will not allow me to include a link in a comment) I said that UBI was the wrong answer to the right question.
There is a big difference between work and a job. A job produces a product that can be sold for enough money to fund the enterprise. Work is useful labor whose product cannot necessarily be sold for enough money to fund the enterprise.
There is a huge amount of unskilled work that needs to be done, but not enough unskilled jobs that pay a living wage.
My proposal is that nonprofit corps with strict controls on executive spending be subsidized by the gov’t to hire people at a living wage to provide useful services, e.g. senior care, child care for working families, transportation for elderly or handicapped people, cleaning of public place, etc.