As anyone who has ever read my sig could guess, I don't like Smogon. They ban everything that beats them, I mean Speed Boost Blaziken doesn't stand a chance against most "Uber" threats. What is the point in tiers, though? They are basically saying "this Pokemon is better than that one" when a properly EV trained NU could probably beat an Uber that has awful EV spread and a bad nature. Is it still better than the NU? No.
Tiers are built on the premise that players of equal skill are competing against eachother, not one idiot who is button mashing and one who has properly trained Pokemon and has a thought out strategy.
(other note: Most Smogon battling takes place using simulators rather than the Game carts)
The whole point of tiers is to give each Pokemon a chance to shine in it's own way. Without tiers, such as on Random Wi-Fi back in Gen 4 via PBR, if your opponent plays Darkrai, Mewtwo, Kyogre, etc..., you're screwed unless you have something equally powerful to back it up.
I don't know why people (like you) are acting like Smogon is "forcing" anything. They only enforce their rules on their site and no one has ever been forced into using tiers ever. It's just while your signature mindlessly and randomly bans Pokemon with little rhyme or reason, while Smogon's tiering system has logic and thought behind it's madness. With tiers, Pokemon like Butterfree don't have to worry about Heatran, Infernape, and Staraptor which they normally wouldn't have a chance against.
For example, Speed Boost Blaziken shows that you don't understand how tiers work. The "uber" tier isn't a tier thats meant to be balanced. It's essentially a ban list. Speed Boost Blaziken became such an overcentralizing threat in standard OU that people were more or less both forced to have it AND build a good chunk of their team to counter it, which is very hard to do. So the question isn't "Can SB Blaziken compete with other ubers" but rather "Can SB Blaziken compete in standard OU without breaking the game" and that answer is No, it can't.