So you expect them to legally bind themselves to dates when third parties are involved?
Absolute rubbish - what fool would guarantee a date and leave themselves solely the liable party if that date isn't met, when it's also dependent on others.
Oh hold on, let me go and start a medical cannabis processing facility and have you invest in that company, and then assure you I am going to have TGA licensing in exactly 18 months, otherwise you can sue me.