Countdown start sound effect in the wrong section of the game audio

Why is the countdown start sound effect linked with the BGM volume and not system sounds? while the 5,4,3,2,1,ENGAGE! is considered system sound? shouldn't it make more sense if both were in the system sounds? It always bothered me that while being part of the same concept, the countdown, both of these are treated differently, and if I need to hear the start of a countdown to have a sound cue, i need to have the BGM volume above what i'd be listening when in-game

Never noticed that cuz I play with BGM on, but yeah, it just doesn't make any sense for a countdown to be considered a background music since it's actually a warning for all players that the fight is going to start.

I wonder if this is why some people do early pulls and completely ignore the countdowns lol

As someone that plays with BGM off, I never knew it had sound effects.