I think the problem is totally different for those who live to see their projects finished. Then there are people like me who have no such urge.

If a person like me can get into the routine of writing (which would be very difficult trick) then the writing itself would probably be quite easy. There is no fear of blank page, no depressive thoughts of "am I ever going to finish" etc. But there is no reward in the other end of the tunnel either. The writing itself would have to be fun enough.