Are your founders lawyers, by chance? It seems like you understand the customer pain, but it's possible that creating a fix for this pain requires an intimate knowledge of how the legal community will react. As GP stated, this could be a social problem, and in that case it is one that is caused/perpetuated by lawyers. Or it could just be a matter of incentive misalignment.

Having deep insights into the mindset and financial incentives of lawyers would seem to be key here (but if you're funded by YC, presumably you've already been asked this question and come up with a good answer!).