Your're right that "And then children won't take edu[ca]tion seriously as there is no more carrot" is wrong. It's more accurate to say there is less incentive to learn, and education will be taken less seriously. But the main point still stands that when work is optional it will be taken less seriously. 13% of people are on SNAP already,[0] and a large percent of those people are not actually looking for a job or only work part time. The idea that this number will increase as a result of UBI is obvious. Claiming that it won't is not, which is why you need to resort to high school debate team tactics of taking your "oppenent" in bad faith and ignoring their points. Grow up.

[0]https://www.census.gov/library/stories/2022/05/who-is-receiv...