I think it depends on what your objective is - are you trying to compile data, or make an argument?
If you're just trying to compile data, then the numbers that are presented are (more or less) accurate. It's no different than saying that Jamie Benn won an Art Ross, but Steve Yzerman didn't. It's a factual summary of what actually happened.
If you're trying to make an argument (or a greatest players list) - yes, for sure, you need to consider the context. (That's when you get into comments like "Yzerman would have won at least 1 Art Ross if not for Gretzky/Lemieux, and Benn peaked during an unusually weak season").
Factual summaries can (and should) support a position, but they're never a position on their own.