Rogues have always been the premier interrupters of World of Warcraft. Back in the day, druids and paladins didn't have any interrupts, much to their chagrin. Warriors couldn't interrupt from Berserker Stance, which left them unable to interrupt effectively. Up until recently, death knights and monks didn't even exist. Shamans have been valuable in the past with their short-CD interrupts, but the main job of locking down a target always fell to the rogues.
Rogues have been tirelessly interrupting spells since WoW's launch 8 years ago. Individual mobs use spells quite frequently. You're bound to find an array of dangerous casters in a dungeon. Interrupts have been a crucial raid mechanic from the days of Molten Core. Other players are also notorious for trying to cast spells at rogues. Kick has been a featured part of the rogue arsenal for years. So why has it failed to evolve alongside the other interrupts?