Just saying, it's been established that the Royal Mask exhibition match is separate from the League itself, so if Satoshi gets that far, he will be the Champion of Alola.
I get that. What I meant to say was that even if he becomes champion, they aren't going to let him walk out of Alola without losing to someone stronger so he can continue to improve. It's kind of like how he won the Battle Frontier but then lost Gary right before heading to Sinnoh. He's likely not going to beat the Alola League and the Masked Royal (because the writers just can't let him be great).