I wouldn't expect somebody taking a survey to distinguish between "not looking for work [because X reason that counts as willfully unemployed]" and "not looking

I wouldn't expect somebody taking a survey to distinguish between "not looking for work [because X reason that counts as willfully unemployed]" and "not looking for work [because gave up on finding employment]". We use the numbers and information that we have access to. They're all flawed, they're mostly better than nothing.