Is there a logical reason why battling players over the internet in Pokemon doesn't get you Exp? During gameplay in X/Y, OR/AS, and S/M there's little good grind area's, (besides battle chateau in X/Y I GUESS...but everywhere there uses like the same 8 pokemon). In Sun Moon, the Battle Buffet is good if you're no above level 15. And The Battle Dome doesn't give you Exp, plus you have to wait until all your mon's are level 50+ or they'll get trounced.

What's the deal? Why can't Game Freaks let us:
A. Refight trainers
B. Get EXP from online multiplayer fights??