wouldn't surprise me celestia has a bunch of stuff around equestria to handle while the main cast do their things

I think a royal problem shows well that celestia has a bunch of stuff to do and it'd not surprise me she'd do the same kind of task off screen (or handling another problem) while the mane 6 (or 7 with starlight) handle villains . Celestia can't also be everywhere either and even if luna help, they're just 2 who need to handle their duty who take a bunch of their day and night. Tbh, i did liked that after the first seasons, they started focusing more on luna.