There's one important nuance here. Those machines are playing against super human defense. In human chess there are countless positions that computers can easil

There's one important nuance here. Those machines are playing against super human defense. In human chess there are countless positions that computers can easily defend whereas even the best players in the world would lose nearly every time. Finding only moves in very complex positions is not really that hard for most modern programs. Doing this over and over for humans, let alone with limited time and with mental fatigue a very real issue, is just not possible to consistently do. This position hadn't reached that critical of a juncture yet, but that's largely because Magnus just started winging it long before the final position. His position was much stronger earlier on. But even in the final position he was very much the attacker and Fabiano's clock was starting to run low. In practical chess, Fabiano definitely faced an uphill battle to try to draw that position.