It is not only convenient, it is absolutely necessary, because a revealed religion is not supposed to change after it has been revealed by God. The goal is for that religion to remain unaltered, much unlike happened to all the religions of the past, such as Christianity and many others which were altered by the followers.
The Baha'i Faith will stand as the religion God is working through during the Dispensation of Baha'u'llah, until God sends another Messenger who will be designated to reveal a new religion which will then be the religion God will work through.
Dispensation
- the divine ordering of the affairs of the world.
- an appointment, arrangement, or favor, as by God.
- a divinely appointed order or age:
e.g. the old Mosaic, or Jewish, dispensation; the new gospel, or Christian, dispensation.
Definition of dispensation | Dictionary.com
By God's appointment and arrangement the divine ordering of the affairs of the world is only according to one religion at a time, the religion that was revealed during the age to which it pertains. Once Baha'u'llah completed His Mission on earth and wrote scriptures, what He wrote is pertinent until the next Messenger of God appears. We do not want it to change from what was originally revealed by Baha'u'llah because then it would no longer be the religion of God, it would be a religion that was altered by man.