Collectively, teams get player evaluations generally right much, much more often than they get them wrong, in the sense that you very rarely see a ~ 25 year old forward who's also a former 1st round pick sign a one year league minimum deal who ends up being much better than a replacement level player after that. (I stress former first round pick, as they're given more rope than lower picks). And again, pretty much every team, including the Devils, has an analytics department now, and saw the stuff Cordell, et al have posted.
So yes, it's an appeal to authority, but the authority has a good track record. And for future reference, there's nothing inherently illogical about appealing to authority.
This argument is so bad. How can you not see how bad it is? Do I have to find some authority greater than me to point out how awful it is so you might see? If I find one of the top logicians in the world and he or she points it out, will you then accede?
In the broadest sense, the NHL values players correctly in that McDavid will be the highest paid player and Brian Strait the lowest. But within that there's huge gaps in valuation. So sure, if you bet on 'they're paying this guy close to right' versus 'they're not at all', you'll win those bets en masse if you get to bet on most of the league. But if you get to bet on one player with that criteria, you might be way off.
A: The NHL tends to be a groupthink league. This isn't demonstrable, but the NHL as a collective tends to value players somewhat close to equally. Watch how a guy like Parenteau will go out and score goals and play well and it's mid-July and Parenteau is once again jobless. The idea that 'analytics departments' have a bunch of sway over how GMs act is pretty unfounded - the Computer Boys got thrown out of having influence in Florida after one season as pretty much everything they did was undid. We won't see analytics do much in the NHL until someone without a serious hockey background takes over as a GM. Maybe Chayka's that guy, but I haven't really seen it yet.
B: The set of players who meet your criteria are insanely small. I would posit that Bennett is almost certainly the best player in that group. Maybe Sam Gagner fits into that group? Nah, too old. Maybe Benoit Pouliot, a guy who kept getting tossed around for smaller and smaller things until he had some breakout years with the Rangers and got a big UFA deal? But probably not, as he didn't ever have a minimum contract - you've set the bars on that group so tiny that basically Bennett and a few other guys fit into it, most of whom were terrible players.
C: I am not and never have been arguing that Bennett is some great player. He produces at a 3rd line level, drives play, and can play both wings. He also doesn't kill penalties, is bad on the power play, and hasn't really had a healthy season in the NHL.
D: The Blues have nothing invested in Bennett and if they don't like what they see right away they can waive him before the season and presumably after being dumped by 3 organizations within the space of about 15 months, probably no one else will be interested.