So, the IDWiots posited an explanation for why Twilight has no plot in season 4. </butt joke>
Though if you look at the season you'll see that they skillfully made all the conflicts in every episode completely unsolvable by magic alone, so no explanation is really necessary. Still, it's a cheap and uncreative, if sensible option to simply explain that ponies would appreciate their grand titans of magical power taking more of a supportive and passive than an active role in their lives.https://www.youtube.com/watch?v=mCaHGPdHHCU
Also meadow muffins is the greatest euphamism for horse poop I've ever heard.