The one who fails to understand something is you. This has nothing to freaking do with what you boys know about the characters. it's you saying stupid crap like this:
"All of F Tier sucks balls. Who cares where they are exactly? They are interchangeable. They have the same lack of potential."
Cause again, if that is the case, there is no need for a tier list. You just can't say crap like that.
Except you can say crap like that, because it's true. The data even shows it.
Tournament results put them at ~the same level of ****tiness. They suck, they don't win, their positions are bottom of bottom. Hell, we'd put all of F tier as 'dead last' if we could, but SOMEone has to go above the others. The SBR votes just put them 'slightly' above the others based on averages of the voting.
I posted earlier in here about analysis of the SBR voting based on the average and standard deviations of their positions, and it turned out that plenty of these votes (CF and Link, ironically enough, are an example of this) were inconclusively different from each other. That is to say, there is no statistical significance in the SBR voting to distinguish Link and CF's positions from one another.
There's plenty of gray area, the idea of the tier list at this point is to put the characters in the right region based on current metagames. When Brawl has been out as long as Melee was at the time of the last tier list, then you can start to bicker about Link, CF, and Ganondorf if they're still dead last.
To reiterate: stats on SBR voting show these characters as NOT significantly different (their positions are entirely interchangeable):
Wario, Falco, Diddy
GW, Pikachu, Olimar, IC's
Toon Link, Pit, Donkey Kong
Luigi, Fox, Wolf, Sonic, Sheik
Ike, Pokemon Trainer
Lucas, Mario, Ness, Yoshi
Samus, Jigglypuff
Captain Falcon, Link