And? What people are asking for is a full, detailed plan as to how the UK is going to deal with the impact of Brexit; on how it will ensure London's financial power is not damaged causing to a loss of jobs, on whether subsidies on certain initiatives/industries from the EU will be continued, and if so whether this will have an impact upon public spending in health and other important areas, and a clear, detailed plan in regards to which specific level the UK government seeks to reduce immigration to, considering this is the primary reason we're doing the whole thing in the first place!
That's...not absurd to ask. It's basic. Very, very basic. I don't need to necessarily agree with the plan outlined by the government in regards to the above, and could potentially pick holes in such a plan, but at least it would outline the intentions of the government, and the manner in which they will reach their intentions.
Saying you want to reduce immigration isn't a plan. Detailing the levels you want to reduce immigration to, while detailing the specific countries/regions that will result in having less immigration, as well as any plans to mitigate the impact, is a plan. Saying you're going to make a success of Brexit isn't a plan. Detailing how you're going to make a success of Brexit is a plan.