Either end of the hiring channel is extremely noisy, recruiters work by spamming and candidates get seen by spamming. In my anecdotal experience, maybe 1 in 10

Either end of the hiring channel is extremely noisy, recruiters work by spamming and candidates get seen by spamming. In my anecdotal experience, maybe 1 in 10 of any given job listing or applicant is worth pursuing. These questions are a less bad way of filtering people out than others. They're not the only filters used, and others have different tradeoffs. Sometimes if you're hitting these questions it's because the other filters have already excluded you.