I'm over 30, but even when i was in my early 20s I couldn't stand the blaring lights. A HS friend built up a rig with full flashy RGB shit and I was like "why?" - He thought it was cool, possibly still does.
I mean, I'm supposed to look at the monitor, not the fan or the mouse. Keyboard blacklight is good, tho, so long as it's not red nor a dancing rainbow. Yellow or white are the best kb backlight imo