With goaltenders there's a symbiosis between him and the defense that is not talked about as often as it should. For a goaltender to really do his job, he needs to have faith that his defense will do theirs. A goaltender that tries to cover for his defense will cheat and leave openings everywhere, and defense that tries to cover for a weak goaltender gives opportunities that makes the job harder in the end for the goaltender. That symbiosis is really important and quite fragile.
So when a shot comes in, the goaltender is not supposed to think about what happens if a shot goes wide but gets redirected. If he starts to cheat to cover that, he leaves openings for shots that is fully his job to stop. So deflections are rarely on the goaltender, they are just a hard save and a good chance if executed properly.
The third goal though was an open man on the far post. Generally you want the defense to cover the passing lane, but you can't rely on that 100%. On a 4-on-3 the goaltender should preferably be a bit deeper, and Bibeau was for sure very slow in his lateral movement there. In the end, it's still a high percentage play that has a good chance to be converted regardless of what the defense and goalie does.
Oh, and kudos on the honesty. "The wise man knows that he knows nothing. The fool thinks he knows all." Chinese saying, but Socrates said something similar. In this example, you are the wise man and I play the fool