Only for the fact that an organized congregation is easier for the church to control. MAybe that was the point all along, for the various churches to be able to twist people to their will?
Ever since the first organized religion arose in Sumer thousands of years ago, the main purpose of organizing religion has been (and I think remains) to support and further the interests of a ruling class or would-be ruling class. I see no psychological or religious reason that religion needs to be organized -- but politically it is a powerful prop to whoever rules or wants to rule us.