There is however a certain value to being capable of doing what you're told, even if you don't understand the why of everything right off the bat. As a business owner if I need certain things in a certain way from my management or employees, especially if it's just a personal preference or a certain way I do things, I don't give a shit if my management understands it as long as they do it.
There's plenty of room for free thought in a good workplace but there are also certain things that don't need to be questioned because it's none of your business.