Considering that roughly a quarter of these games saw the Toronto Maple Leafs play without both of their two best defensemen, that is a pretty decent record.
Consider also that the Leafs received the 24th best goaltending during this time, despite allowing dangerous scoring chances at pretty much the same rate as “good defensive teams” like Dallas, Arizona, the Islanders and Blues.
It doesn’t take a rocket scientist to realize that goaltending is the great randomizer of the NHL. Goalies have a massive effect on games, but at the same time, you can’t really predict how a goalie will play.