The poor soil of bogs, for example, offers little nitrogen and phosphorus, so carnivorous plants enjoy an advantage over plants that obtain these nutrients by more conventional means.
If one parent is firm and the other is too forgiving, the son or daughter will key into that and attempt to manipulate the position to his or her advantage.
Of course, this specialized knowledge gives their employers a competitive edge in the hospitality business, where patrons are not easily impressed---but can be easily bored!
There is no inherent benefit of subliminal advertising over regular advertising, any more than there would be in seeing a flash of a commercial instead of the full twenty seconds.