It seems like you're looking for some validation for the obvious.
Actually, I was looking to learn what people's positional baselines are when considering the value of player production. The answers were surprising indeed.
For example, the vast majority of respondents preferred 16 games of an 11 ppg WR over 12 games of a 12 ppg WR. To me, that's insane. It implies a baseline of less than 8 ppg. In other words, if you have a WR on your bench who scores more than 8 ppg on average (and this is ppr, so who doesn't?), then you should prefer the 12 game, 12 ppg WR.