You're right, they don't, but when a job post is public, it's an absolute flood of bids and submissions, and can be overwhelming to sort through to find the qua

You're right, they don't, but when a job post is public, it's an absolute flood of bids and submissions, and can be overwhelming to sort through to find the quality. That's why the best clients are the ones who solicit freelancers and don't make those listings public.