Well I can argue Hughes is not putting up the points he does without Miller or Boeser bc they are two of the main recipients of his passes that put it in the net. I have not bothered to track these dweeb stats that you guys do, but considering how much these two players alone help him rack up assists, I wouldnt be surprised if they are helping his defensive zone numbers as well. Especially with a player like Miller who does well in both sides of the ice.
You seem like an old school hockey guy, did you ever play? Did you ever have a coach or adult tell you that the process matters more than the results? Don Cherry types would call it "playing the right way" and as long as you did that, you'd do well?
We use advanced stats to see who's "playing the right way" while not just looking at how much they score, because sometimes playing the right way doesn't end up in a goal, and sometimes players play the wrong way but still get rewarded.
To put it simply, Makar isn't playing the right way when MacKinnon isn't out there too.
When Makar is on the ice and MacKinnon isn't, of every 100 shots taken, only 40 of them are from the Avalanche. When they're both on the ice that number jumps up to 61. This means the Avalanche fail to break out, get trapped in their own end, etc. when MacKinnon isn't there.
When Hughes is on the ice and Miller isn't, of every 100 shots taken, 62 of them are for the Canucks. When they're both out there, that number is 66. This means that Hughes is rarely trapped in his own end and is able to break out of the zone regardless of who his linemates are.
Additionally, when it's Miller out there alone the Canucks only take 31/100 shots. So in reality it's not true that Miller is defensively elite, he actually doesn't control play at all when Hughes isn't also out there. It's Hughes who is playing the right way.
We use a stat called expected Goals For (xGF%) to measure who's doing things that usually result in goals, it's like boiling down a play-the-right-way stat to a percentage.
When Makar is out there with MacKinnon, the on ice events that lead to goals is about 65% for the Avalanche, but Makar's expected goals drops all the way to 37% when you only look at his ice time away from MacKinnon.
If you look at Hughes, when Miller is off ice, of all the events happening that usually contribute to goals, 61% of them are happening for the Canucks. If you look at Hughes even with just the 3rd and 4th line, that number jumps up to 69% indicating that Hughes actually makes his whole team better while Makar struggles with anyone else not named MacKinnon on the ice.