I'm not saying it can't be figured out. Of course it can. What I am saying is that nobody here, unless they work for Blizzard, can possibly have any knowledge on the difficulty inherent in implementing any specific project. It is pure conjecture on both sides. All we have to go off of is what we are told. So you either are of a mind to accept that, or think that it is complete BS. But either way, there is no definitive factual basis for either conclusion.
It has never been a question of COULD it be done. Even Blizzard says, in a roundabout way, that it could be done. What they are telling people is that it would take more time and effort than they are willing to put in right now. WHY that is the case is left up to speculation, and regardless of how much training or experience someone might have, that is all it will ever be unless you are a Blizzard employee. So quit talking like you are the greatest mind on the planet, blessing us mere mortals with knowledge that is so obvious you can't grasp why we don't inherently understand it. You are guessing, just like everyone else here. Because despite whatever training or knowledge you may possess, you still lack access to facts necessary for you to be able to make an informed, intelligent determination of the scope and complexity of a specific project.