For your first point, you would very clearly argue that despite winning a cup, Eichel is in way a better or greater player, or otherwise more deserving of higher pay than McDavid or Draisaitl.
Right now, Jack is on a $10 million per year contract and Draisaitl is at $8.5 million. Could you possibly make the argument that Draisaitl is actually worth paying less?
No.
Therefore, the most common argument against Matthews shrivels up and dies right there. The measure of a player's valuation in terms of contract, is not winning, but how well he performs.
There is a quantitative measure for how well a player performs, and we award it at the end of every season - year end awards.
Matthews has earned more of these than other similarly paid athletes - Pastrnak, MacKinnon, Panarin, Tavares, Marner, Kane, Toews, Bobrovsky, Eichel, Tkachuck, Huberdeau, anyone else with a $10million or higher AAV.....with the exception of McDavid, and of course, Draisaitl.
Of those players listed, Matthews is youngest (drafted at the same time as Tkachuck), and has achieved more and greater personal success.
He is not only a Richard Trophy favourite every season, but plays at a Selke level simultaneously.
Of those players listed, none can even begin to argue they are as strong offensively and defensively as Matthews is.