It seems like you’re trying to make the case that they’re equal caliber players, to which I would disagree.
But, I do agree with the second part of your post. If you’re the Leafs there’s no need to trade Nylander unless you get a top-4 right-shot defenceman back.
Here is the thing though nobody wants to trade a top 4 rhd for Nylander. Especially Fter his current performance.