Board Thread:General Discussion/@comment-28109177-20180718045132/@comment-27700324-20180722035313

It also makes Oliver feel like nothing. He can just sit back and have Supergirl handle his problems. This is why they kept Supergirl in a seperate universe. As in a place Oliver has no access to. So the episodes don't get easily solved. There is no conflict for the Arrow characters to deal with if Supergirl wasn't busy in her own world.