Earlier quoted context omitted.
That is an interesting point, it is actually a strategy in the game to speculate on the opponent deck composition so it would make sense not to trivialize it here.
Of course, but how do you "fairly" account for that? You could teach the computer what the "meta" looks like, but players never reveal full deck contents to each other in tournament play. Also, how does the AI select its deck? Does the player know going in what deck it will be playing? Part of the problem here is that you can build a weird, off meta deck for either the AI or player that can win a single game but what…
In theory if you had an unlimited amount of time and compute resources couldn't you just construct all possible decks and play them against each other, perhaps with some mix of naive and pre-trained strategies?