I clearly hear what you're saying, and I understand your stance on it. But I can't agree with it.
The burden is on the folks hiring in my opinion.
This is not a "real life" scenario. It should be a SHORT assesment (for both parties). If you were employed within a company as an engineer and you received a nebulus spec (or no spec at all), the burden is then on you to identify, educate, and communicate.
Not during a pre-interview (for the chance and maybe being blessed enough to get a full interview with this world changing company).