I think a bit of the aggressive denialism comes from sour grapes that American society’s best hope for UBI came from capitalists in tech instead of progressives in policy.

UBI used to be a bit of a funny reddit pipe dream. Now it’s a serious long term hypothetical being trialed in the short term and that’s solely as a result of AI progress.

When that result undermines the tenet that capitalism is the root of human suffering, it’s simplest to just reject the result wholesale.