Welcome, losingit!
That would make it very hard for you, wouldn’t it?
That sentence is important because it is a logical fallacy [links to pdf], a version of "begging the question". That fallacy relates to questions that presume their own answer. They are presenting the Watchtower's opinions (a parent who "stops worshipping Jehovah" is bad for the family, anybody leaves the Watchtower organization has turned against God, "apostates" should be avoided, etc.) as undisputed facts.
Seeing this manipulation as what it is an important first step in vaccinating yourself against the mind control.