Sure, it is more difficult to play well against, and beat, more talented opposition.
Not arguing that at all.
We just appear to have someone saying this is true because of course it's true despite the lack of evidence to prove it.
And I don't agree that we should just assume things.
Rick Dempsey won a WS MVP on a team that had Eddie Murray on it.
Which one of those two is known for being "clutch"?