I'm not all that familiar with stats so I'm a little lost. And I sort of don't understand the tone of your post, is the yelling directed at me or Game Freak?
The yelling is at Gamefreak. Fire is weak to rock, ground and water and all of the types fire resists are weak to it anyway. Psychic would also add dark and ghost weaknesses and neutralize Fire's bug resistance. Passing that off on a defensive Pokemon would be suicide.
(Bulky pokemon are supposed to be pokemon that can take a good few hits while dishing out some pain in return)