I completely agree.
Zegras made a lot of really key defensive plays in the medal rounds. He's not a floater, but I can understand why some people think he's more of an E-W player who makes some riskier plays that might sometimes get the coach a little upset. Thats definitely his game, but he puts in the effort in all zones, and will do what's needed to in the key moments in any zone.
I think this is why he's a center. There's simply more value to keeping your players at center, and I don't see why he doesn't project at center. I hope the Ducks keep him at center and don't try to move him to wing because it's the easiest path to him having a big offensive impact in the NHL.