I agree with this. Though I also understand the wisdom of the crowds angle, i.e. just because you have different valuation than market doesn't make it right. Effectively, the market might not be efficient, but good luck exploiting it consistently. I think the truth is somewhere in the middle, and it is a difficult trade-off to navigate.
If you don't believe that you can exploit the market consistently, why are you playing this game? I'm not trying to be a jerk here, but to me that's like admitting that you have no edge. I would never sit down at a poker table if I didn't think I had an edge or I didn't think it was possible for me to eventually gain one with experience and learning. Likewise, I wouldn't play FF if I didn't believe that it was possible to gain an edge over the average owner.
In FF, 3-4 good calls can make the difference between having an average roster and a great roster. That is kind of emblematic of the strategy I've been shifting towards over the last year or two. If I can basically operate at an average level with most of my roster moves and then occasionally find specific instances where I can get a player for well below what he's truly worth or sell a player for far above what he's really worth, that should be enough to elevate my team into the playoff picture.
So it's not necessarily about knowing the true value of every single player far better than the wisdom of the crowd, but more about identifying a small handful of spots where the crowd gets it very wrong. So basically playing an ABC style and then finding that small handful of high-certainty spots where you're convinced that you can make a move for high EV. I think that's an achievable goal.
As far as the wisdom of the crowd goes, I think the crowd is far better at assessing certain types of players than others. I think there's relatively little ambiguity with players like Graham, Dez, and McCoy who are established commodities in their prime. Any significant deviations in their valuation among owners are probably just a result of failures to understand scoring systems and relative value. However, many players are a lot more ambiguous. Is Bryce Brown a future NFL starter or just a career backup? Is Tyler Eifert a future top 5 TE or just another serviceable mediocrity? Will Paul Richardson be a 1000+ yard receiver in the NFL? Is Trent Richardson a permanent bust or will he bounce back and have a good career?
I don't think the consensus is well-equipped to handle ambiguity for the reasons I mentioned previously. It treats players as a compromise between their potential career outcomes when in reality most players will break more sharply in one direction or the other. So I think if there's a big edge to be gained in FF, much of it lies in answering questions of this variety rather than drafting robotically off the same cheatsheets as everyone else. You don't need to be Miss Cleo with every single player out there, but if you can get even 2-3 of these questions right in a big way per season and then just have average team management in every other respect then you will actually stack up a pretty big advantage over time. Consensus rankings aren't going to serve that end because by definition all they tell is what everyone thinks, not whether or not that thinking might be off-target in specific cases.