CC is only somewhat viable in this game, and encounters aren't designed around it. Some jobs can Sleep enemies, but in general, there aren't any instances where that would really be needed. Dungeons don't output enough damage, and don't have enough dangerous single mobs to require that sort of thing (outside of maybe Stone Vigil or Aurum Vale). Really, any mitigation provided by CC is generally not going to be anywhere near as effective at mitigating damage as will be killing it faster (especially with how indiscriminate AoE spells are).