Why do Scholar's job quests still require a level 30 Arcanist to start?

[Rongway]

Summoner has absolutely nothing to do with Arcanist, even remotely, and never has. If anyone needs to be detached from Arcanist, it's Summoner.

Whether or not we agree on this doesn't really matter; the technical ease of making either SMN or SCH its own job wouldn't change based on which one you choose to alter.