> but nobody that was raised with completely unexplained rules so it's a bit of a strawman comparison.
That's your strawman creation. I never claimed people were raised with arbitrary and unexplained rules. Typically strict rules are given punitive reasons as motivation for following, not some intrinsic rationale within the rule -- and that's precisely the difference.
"Wash the dishes or you'll be sent to your room" doesn't teach why you should wash the dishes, only that you'll be punished for not doing so.
"I should wash the dishes so I have clean ones to eat off of later, eating off of clean dishes prevents sickness." Provides a complex rationale to drive the behavior.
The punitive approach requires no brainpower to follow, there's no specific reason why the effect (punishment) follows from cause (not washing the dishes) other than it was something imposed.
The principle based approach requires understanding logical cause and effect, chain of events, pre-planning and might drive the person to investigate why dirty dishes make one sick, opening up inquiry and forming connections into hygiene, medicine, pathogens, etc.
Given a different, but similar situation, why should the rules based person create a behavior?
"Wash the thermometer before and after use" is something the principle trained person would come up with naturally based on prior experience and reasoning, but unless some cause and punishment were set out for the rules trained person, it's likely they won't arrive at that behavior.
More sinister, and the context I'm familiar with this work in, is in advertising, building and forming habits. Advertisers are seeking to train consumers to logically arrive at buying their product rather having to be constantly reminded to. Especially since a company has much more trouble "punishing" a consumer for not buying their stuff than a parent might a child. If you can convince a consumer to derive the thought themselves to buy your product, then you own that consumer and no longer really need to advertise to reach them.