To be the devils advocate here, how would that system be fair to workers not replaced by robots? Like if im a plumber i still gotta put in my 40+ hrs/week but a factory worker just gets UBI now?

Everyone would get UBI. Nobody would be forcing you to keep your plumbing job. And even if you stuck around, you wouldn’t have to work 40+ hours plumbing weeks because UBI would give you the ability to chose what dmjobs youd want to take on. And maybe now that those factory workers aren’t stuck in factories, some of them might actually want to learn how to be plumbers, meaning more plumbers to take on jobs.

I highly doubt most people are just going to pick up a trade as if it is a hobby if they are getting a UBI