Which is all fine and well, except Bolts aren't exclusively creature control. While they do have that use, they can also be used directly on your opponent, thereby never making it a dead draw (sans a reflective shield). If there's no threatening creature on board, use it against your opponent for some quick damage. If there is, it's nice to have that option.
And the difference isn't as great as it would seem, especially in a metagame that consists of many creature control cards. Let's just set up an example. You've got 10 quantum.
For 10 quantum, you could put down a dragon that hits for 12 and is vulnerable to just about every creature control out there. At 3 health, the only effects that don't outright kill it are low level drain lifes and ice bolts, and the latter has a chance to freeze the dragon. And that's not taking into account time reversal (which kills the momentum of a dragon rush), any amount of shields (dusk, fog, and phase being the big ones), or creature effects like Devour, Paradox, or Freeze.
For the same 10 quantum, you could hit your opponent for 6 with the Fire Bolt, unstoppable except for one or two select shields. Or you could take out any creature with 6 or less health, taking out those nasty Otyughs or Demons that seem to have no problem paradoxing your dragons/golems. Plus, after using the Bolt, you have 7 quantum left over, giving you the option of playing another card or getting a head start on next turn's play.
I understand the concept and the need for speed in a rush deck. However, with the vulnerability of the dragon in combination with the versatility of the Fire Bolt, it just seems like a smarter option to go with the Bolt.