I can't believe you keep coming up with these arguments about "If I spam fireball I do more dmg if I get 200 int instead of 200 hit" and that it will increase your DPS. If you haven't been playing cataclysm at all, you ofc won't have noticed it, but really, CC and interrupts are really important. I cannot stress how important it can be to not miss that spell, sure it might "only" be 5% chance, but if you're really unlucky, that might result in a wipe.
So here's what you have to chose between: Pumping out maximum DPS according to some math OR actually doing what you're supposed to and not rely on luck. If you can't see which one is the right one, I feel sorry for you. ITS NOT ALL ABOUT MAX DMG, for the love of god.