Sure alignment happens sometimes but you still play all the teams in the league numerous times throughout the season.
This suggestion is a 56 game regular schedule all played against only 6 teams, while not playing the other 24 teams even a single time in the regular season. When has that ever happened in NHL history previously?
Of those 7 CDN teams 4 are guaranteed to make the playoffs, and 2 are guaranteed to be in round #2 no matter what happens. You're never going to get any better odds than that !!!.
Considering last year the top 10 best teams in the standings all played in the USA, so that puts all 7 of the CDN in the bottom 20 in strength of competition. So you're eliminating 1/3 the leagues best teams from the Canadian Div competition, while guaranteeing 1 of those a final 4 spot in the playoffs in round #3.
So while Toronto gets to play Ottawa 9-10 times in the regular season, a team like Boston from our original Div needs to play Pens (Crosby/Malkin), Was (OV) and Philly 9-10 times etc just to qualify for the playoffs. Strength of Schedule of Div is not balanced, where equal odds of advancement would assume all teams are equal in strength so it doesn't matter whom you play.
For a Canadian team to win the Stanley Cup they only have to beat 6 other Canadian teams, and max 2 or 24 USA teams or 8 teams total to hoist the Cup and potentially never face Boston, TB, Pitts, Washington etc even a single game.
Our Leafs are never going to get a better opportunity then this Astrix filled pandemic season to advance to round #2 alone, to break that 16 year streak of not advancing past round #1 when we had to play all the good teams most of which all resided in the USA since a Canadian team hasn't won the Cup in 27 years.