Sometimes an explanation is not only simply not necessary, like in the case of daily chores, but may be detrimental to the child, such as in the case of emergencies or topics for which the child is not ready. Obedience without question is a virtue when applied to legitimate authority, that is those who are trustworthy, responsible, and proximal.
In the case of adults, imagine if an employer had to justify his direction at each step in a process. Eventually, the employee may benefit from an explanation for each step, but it would be better for both to get him familiar with the process first.
So, too, with law and governance.
Now, I would say much of our modern governance is not trustworthy, responsible, nor proximal, but great caution need be had in resisting. Take stances carefully.
Daily chores are simple & really important to explain. Making your bed keeps dust off of the layers where you put your face & reduces the likelihood of acne, while also making the bedroom feel less chaotic. The bed is often the biggest thing in the room. Chaotic environments have a greater impact on our mental condition, than most people realize. Diet has as much impact on skin as anything, but clean towels, clean sheets (free of dust & pet dander), well trimmed fingernails, & daily showers all play a role too. Dirty floors mean that you get into bed with dirty feet. Dusty or dirty surfaces mean that anytime you sit things down or move anything around you stir up stuff & spread it to your bed or elsewhere. Properly stored clothes are also generally protected from dust & pet dander.
We are creatures of habit, if we build good habits early in life then things are easier as we get older. It is much harder to correct bad habits than to build good ones in the first place. It's a great opportunity to tech them about low time preference vs high time preference behaviors. Those "choose your hard" memes are probably helpful here.
Every tyrant always resorts to emergencies as an excuse, but generally proper explanations of reality are what prepare people for genuine emergencies.
"Topics for which the child is not ready" are also rarely as hard to deal with as some people make them out to be. It is being uncomfortable about a topic that makes things difficult, kids usually aren't the problem.
Employers are generally paying for people to do things the way they want them done. But even so, most of the best employees are going to need to be sold on the mission to get the best performance out of them.
Governments are force funded organizations built on lies & coercion. They are always criminal. If the goal was only to help people & to only do things that people wanted then all funding would be voluntary. All funding is forced because the goal is to do things that make most people's lives worse. Some portion of the population is also bribed with crumbs to oppose & attack those who might otherwise be a threat to those stealing from everyone.