Ask HN: Why can't we comment on YC jobs postings?

It seems odd we can't post comments on the YC job postings. It would be a good way to provide quick feedback to these companies and to connect with potential hires. I have tried sending emails to several with no response. The monthly `Who is Hiring` posts seems to provide a good means of discussion around open positions listed. I would assume YC companies could get similar feedback and potentially make a hirable connection faster than forcing that person through a normal hiring funnel, which, I have found for most of these small YC companies gets you absolutely nowhere.