No offense but I think you are misremembering somewhat. Game 5 we got absolutely bludgeoned and outchanced by a huge gap - and managed to win by some miracle.
I don't take any offense. I just watched the highlights from the series and noticed the shot differential.
It's just shots, so it's not the same as "chances" but here's the breakdown from that series.
Game 1: 41 shots for, 42 shots against (4-3 OTW)
Game 2: 38 shots for, 45 shots against (2-1 L)
Game 3: 30 shots for, 27 shots against (5-4 L)
Game 4: 26 shots for, 30 shots against (4-1 W)
Game 5: 28 shots for, 50 shots against (3-2 2OTW)
Game 6: 24 shots for, 37 shots against (5-3 W)
So for the first four games the shots were pretty close. The only game it was really lopsided was game 5. If we're referring to singular games as being "out-chanced" or being "bad" because of fancy stats then I care even less about them. We all knew going into that series that the Islanders would lean on their defense and goaltending to win, that's how the team was built. Now the argument is that because they leaned on that strength that they were bad. Crosby, the best player in the series, had a whopping two points in 6 games (1G, 1A) which doesn't align with the "Islanders were bad/lucky" narrative trying to be portrayed here by the fancy stats. The Islanders chose to emphasize certain areas of the game over others, and they had success.
Just to re-iterate my point, I'm not at all suggesting that the Islanders dominated the competition or that they were some offensive juggernaut. They were a defensively sound team that leaned into that intentionally. The fancy stats are inaccurate at predicting winners and losers, and they should be taken with a grain of salt.