That's not what I meant.
The relics are time intensive grinds. Has nothing directly to do with raiding or not raiding. Many aspects of the grind CAN be optimized if you choose to do that part through raids (light grind, you get more light in some raids than dungeons AND they take less time to complete).
It's simply a task you can spend time on for a tangible reward. All past expansion relics are just glamour fodder (nice ones in many cases) and the current one is really just something to do while playing.