Q "why does god need an organization?"
A "historically, god has always used an organization. in noah's day, the ark. then the nation of israel. then the christian congregation."
Q "oh, how interesting. what about this tiny little gap in time from the 1st century to the 19th? what was the organization then?"
A "during that time, the 'wheat class' was apparently in existence but scattered. at times, they were small groups. at other times, they weren't."
Q "i see. so how do you know the situation has suddenly changed after 2 millenia?"
A "because we are now in the last days and an organization is needed for the harvest work."
Q "and how do you know we're in the last days?"
A "because the organization has correctly explained the prophecies which identify the last days."
Q "please see my first question."
wash, rinse and repeat.
mox