Because the moves that never miss have a base accuracy of 100, and because of the evasion/accuracy clauses, the only way they will miss is Sand Veil/Snow Cloak, or Brightpowder.
Flamethrower, Surf, Thunderbolt, and Ice Beam all have Base accuracys of 100%. This can be modifyed by accuracy boosting/lowering moves, abilities, and items, and evasion.
On the other hand, moves like Fire Blast, Draco Meteor, Stone Edge and Blizzard have different numbers. This is their unmodifyed percentage of accuarcy.
When on Shoddy, each attack has 2 numbers, the first being Power, the second being accuracy, as a percentage.
The metagame relies mostly on high-power, but reliable, moves. The general exceptions to this are Fire Blast [Where, statistically, you're better off with it] and Stone Edge [Where there is no 100% accurate alternative]