In closing, this system is a blight. It does nothing good. It accomplishes no goals. It is seeped in misunderstanding and flawed logic. It causes class bigotry, gm to player friction, gm stress, and player stress. And I personally wish it would die in a fire.
The Tier system is simply a method of classification that can help people understand the inherent flaws in class balance in D&D. If you don't find it useful then don't use it, but posting a rant like this is simply in poor taste.
"We have sent many to Hell, to smooth our way," said I, "and we are standing yet and holding blades. What more?"