Marner is a top 3 2-way forward in the league. They use him in every situation, and he's excellent at them all. It's a big price tag but he earns it.
Similarly, Matthews can really defend too, on top of averaging 50 goals per 82 games played.
Again, it's a giant price tag, but it makes more sense than a lot of massive AAV's in this league.
If these AAV's were so debilitating, they wouldn't be finishing 4th in the league.
Tavares is the contract you should be mentioning. He's a defensive liability, and his production is worse than these 2.