This is BS - if a company knows all the answers to these questions, then the company is not innovating. The hardest thing about innovation is finding out who else believes your vision. The assumption that a good business has answered all these questions is the assumption that this good business is not innovating.
Revenue forecasting for new products is hard, and investors who add value to high risk start ups must recognize the risk in innovation. If you want answers to these questions, either insist on bullshit stories or invest in old school businesses. No risk = no return.