One of the things all abusive and controlling parents have is a singular obsession with maintaining the primacy of the nuclear family and absolute parental authority.
Same goes for cults, calling something a cult doesn't automatically mean it is an organisation dedicated to destroying itself. Some cults are organised by people who ultimately want their community to be successful and hold extremely worthwhile values. Too much authoritarianism will be a disaster but nuclear families are a good compromise position where there is just a dash of authority in the small.
(I’m already responding more thoughtfully in other areas of this thread, so won’t regurgitate the same points here)